balancing chemical equations worksheet grade 8 with answers

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49 Balancing Chemical Equations Worksheets [with Answers]

Do you find balancing the chemical equation a daunting task? If yes, then you may also get confused playing with the molecules and atoms. You have to balance the chemical equation no matter what, as per the Law of Conservation of Matter, but many students find it difficult to balance it. Balancing requires a lot of practice, knowledge of reactions, formulae, valances, symbols, and techniques. Often, students lose hope and struggle to solve it. If you are struggling as well, then all you need balancing equations worksheet with answers.

Table of Contents

• 1 What is a Chemical Equation?
• 2 Balancing Chemical Equations Worksheets
• 3 Why is it Important to Balance the Chemical Equations?
• 4 Balancing Equations Worksheets with Answers
• 5 What are Different Types of Chemical Equations?
• 6 Balancing Equations Practice Worksheet
• 7 How to Balance a Chemical Equation?
• 8 Methods You Can Use for Balancing Chemical Equation
• 9 Tips to Balance Chemical Equations
• 10 Limitations of Chemical Equation
• 11 Final Thought

Understanding the methods and tips can make it easier for you to balance the chemical equation. When you balance the equation, it automatically establishes a mathematical relationship between products and reactants. If you often get confused in balancing the chemical equations, explore some ins and outs and tips for balancing the chemical equation in the article.

What is a Chemical Equation?

A chemical equation is the symbol in Chemistry that represents chemical reaction with the help of chemical formulas. It contains the chemical substances that are involved in the reaction. It contains reactants and products. The reactants are the elements that react with one and another in a chemical reaction, while the products are the elements that we get after the reaction.

The chemical equation has the products on the right side, while the reactants are written on the left side. Both of them are separated by an arrow. For instance, 2H2 + O2 -> 2H20 denotes that there are four atoms of hydrogen and 2 atoms of oxygen on both sides of the equation. The amount of reactants must be equal to the amount of products. When students get big chemical equations in a balancing equation worksheet, they often find it to be very difficult. We will help you understand through some tips in this article too, to help you get through the process seamlessly.

Balancing Chemical Equations Worksheets

Why is it Important to Balance the Chemical Equations?

When you are stuck in balancing chemical equations, you may often wonder why you are doing so. Some students do not bother and just balance it because they are told to do so, but some of them try being logical and want to know the actual reason behind balancing it. It is necessary to balance it because there must be equal number of atoms on both the sides of the equation. Also, it needs to be balanced from both sides, due to the Law of the Conservation of Mass.

The law states that there should be an equal quantity of both before and after the experiment, ensuring the quantity and quality remains the same. This law was established by Antoine Laurent in 1789. He explored that the matter either cannot be destroyed or created. Moreover, equations need to be balanced properly because unequal equations are not correct equations. No matter if they have correct elements and quantities, they will not be considered accurate. Also, these unbalanced equations cannot be used in calculating the chemical reactions .

In addition to this, chemical equations need to be balanced even because chemicals will not react until you have added the correct mole rations. Additionally, balanced equation is necessary in determining how much reactant you would need to have, for making the specific product. This simply means that the correct products will not be formed unless you add the right amount of reactants.

Some students really find the balancing equations difficult in balancing equations worksheet. It is hard and may require struggle but all you need to do is practice, have patience and need to have good memory. At first, you may face difficulties but you need to keep on working hard and surely you will succeed. We will be explaining the tips below in our further section, but here are brief ones. You need to learn reactions and write formulae of reactants. Understand the concept and balance the equation. Once you understand the concept, you will be surprised at how easy balancing will become for you. It may seem hard to believe right now, but keep working on these equation, and they will suddenly just click. Once you understand the logic behind them, there’s no stopping you.

Balancing Equations Worksheets with Answers

What are Different Types of Chemical Equations?

Before we help you in understanding the tips and tricks of balancing equations, you first need to know the types of chemical equations. Basically, there are five types of chemical equations and their reactions. Check them out below.

Combination or Synthesis Chemical Reaction

This is the most common type of chemical equation. In this chemical equation, a new product is formed by combining two to three combinations of reactants. For instance, H 2 + O 2        H 2 O. This is a chemical equation where two atoms of hydrogen are combined to form a product, water. This is why this reaction is called as synthesis reaction. Additionally, this is also an unequal equation because there are two atoms present for the oxygen on the reactant side while there are is only one atom on the oxygen side for product. But the equation is only valid when the number of atoms and moles are equal on both sides. You can balance the equation using the combustion method which will be explained later.

Decomposition Chemical Reaction

Decomposition chemical reaction is the reaction where only one compound decomposes and results in two or more than two products. Pb(No 3 ) 2       PbO + NO 2 + O 2 . In this equation, lead nitrate is being decomposed, which breaks down to form nitrogen dioxide, oxygen, and lead oxide. This is an example of a decomposition reaction.

Displacement or Replacement Reaction

Another very common chemical reaction is of two types, i.e. single displacement and double displacement. In single displacement reaction, any one chemical partner exchanges from reactants to products while two sets of chemical partners exchanges from reactants to products. An example for single displacement reaction is XY + Z      XZ + Y.

In this example, zinc will replace hydrogen from sulfuric acid to form zinc sulfate. As you see, only one cation is being swapped here, that means that it is a single displacement reaction. Continuing the similar example, in the second displacement chemical equation, BaCl 2 + NaSO 4        BaSO 4 + 2NaCl would be the equation. In this equation, chloride ion leaves Barium and attaches to sodium.

Combustion Reaction

This is the chemical reaction where an oxygen compound and carbon compound combine together to become H 2 O and CO 2 . It is the reaction where mostly an organic compound like oxygen burns yielding to water, carbon dioxide, or some other product. The combination of any substance with oxygen results in combustion.

Acid Base Reaction

This is the simple chemical reaction where acid and base are combined together to provide water and salt. This reaction is also called as neutralization reaction and most commonly called as acid-base reaction. These are really important type of reactions that occur in biological systems.

Balancing Equations Practice Worksheet

How to Balance a Chemical Equation?

When students often get frustrated, they opt for balancing chemical equations worksheet answers to resolve the problem. If you also find difficulty in balancing the chemical equations, follow the steps below.

Step # 1: Write Down the Unbalanced Equation

The first step to balance the equation is to write down the chemical formula of reactants that are listed on the left side of the chemical equation. After this, you can list down the products on the right hand side of the chemical equation. There is an arrow between the sides, signaling the direction the reaction is happening in. Once you have gathered the unbalanced data, it will help you in balancing the equation.

Step # 2: Balance the Equation

Now it is time to apply the law of conservation of mass. This law states that the same number of atoms should be present on both sides of the chemical equation. One of the easiest ways to balance the chemical equation is to look for an element that has only one reactant and product. Once that one element is balanced, you can proceed towards balancing the other one. In this way, you can keep moving to others until all the elements are balanced.

By placing the co-efficient in front of them, you can balance the chemical formulas. Often people get confused and add subscripts, which entirely changes the formula. There are three basic methods to balance the chemical equation. We will be explaining each one of them below in our further section. You can any one of those looking at the type of chemical equation.

Step # 3: Indicating the States of Matter

Lastly, you need to indicate the states of matter of the products and reactants. You can use g for gaseous substances. You can use l for liquids and s for solids. If you find species in solution of water, use aq for that.

Methods You Can Use for Balancing Chemical Equation

There are two different types of methods that are commonly used for balancing chemical equations. Check them out below.

Combustion Reaction Method

This is the type of method that is used to balanced equations that have oxygen on both sides. Often, these are difficult to balance. When you find difficulty in balancing the equation in the balancing chemical equations worksheet, you can miss it with a fraction of ½ and that will easily balance the equation. But the problem is that you cannot have a fraction for the co-efficient, this is why doubling all coefficients will help you balance the equation.

Proportion Method

This is the second type of method that can be used to balance the equation. It is used when the chemical equation is difficult to inspect. If you do not understand the equation after a few minutes, use the proportion method. Ensure to change the value of co-efficient and not subscript.

Tips to Balance Chemical Equations

If you also get perplexed in balancing chemical equations, follow the tips for correct balancing chemical equations worksheet answers.

• Tip # 1: When you are trying to balance the chemical equations, you should remember that you can only change the value of coefficient in front of the element or compound, and not the subscript.
• Tip # 2: You should remember that polyatomic ions should be balanced as a whole. For instance, SO 4 should be balanced as a whole instead of Oxygen and Sulfur separately.
• Tip # 3: You should remember to balance that number first that has the greatest number of atoms in any product or reactant. Ensure that these elements are other than oxygen and hydrogen.
• Tip # 4: You should count the number of atoms of each element on both sides and see whether or not the equation is balanced.
• Tip # 5: When you successfully balance the equation, ensure to check the co-efficient. It should be in their lowest term.

Limitations of Chemical Equation

There are certain limitations for chemical equations listed as under.

• There are some chemical equations that do not clarify the state of substances. Therefore, you can add g for gas, l for liquid, s for solid and vap for vapor.
• The chemical equation does not give any information regarding the speed of reaction.
• Sometimes, the chemical equation also do not give the concentration of the substances, this is why terms like concentrated and diluted are used.
• Chemical equation will not tell if the final product would have color change or discoloration. This is why it has to be mentioned separately.
• The chemical equation also does not give any information about the speed of the reaction.
• Some chemical equations and reactions have diverse affect.

Final Thought

Students likely find difficulty in balancing chemical equations worksheet. To help you resolve this issue, we have balancing equations worksheet with answers on our main website. You can simply download it and cross-check your chemical equations. Practice for your exam using these worksheets and give your best. Good luck!

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Balancing Chemical Equations with Ease (100 Free Worksheets)

• October 2, 2019

In this article, you will learn about how to balance chemical equations easily with simple steps. Feel free to download our free worksheets with answers for your practice.

Parts of a Balanced Chemical Equation

Before you start balancing chemical equations, it is important that you become firmly acquainted with the various part of one. Every balanced chemical equation consists of two parts: the reactant side and the product side. Both of these sides are separated by the means of an arrow.

On the left side of the arrow, you will find the reactant side. This side represents the elements which are used for initiating the experiment. On the right side of the arrow, we have the product side. This side is used to display the elements or compounds which are generated from the chemical process.

The Need for Balancing Chemical Equations

Ever since you started learning about the field of Chemistry, your teachers might often have stressed upon the importance of balancing chemical equations. But have you ever pondered on the reason behind this? Why do you need to respect the law of the conservation of mass? Quite simply, you need to balance your equations to follow the law of conservation of mass.

Law of Conservation of Mass: According to the law of conservation of mass, the mass of products that are derived from a chemical equation should mandatorily equal the mass of the reactants.

Minding the law of conservation of mass while balancing equations is quite important. Not only does it help you to prevent errors, but it also assists scientists in knowing the quantities of reactants to create a particular product that they want to make. Moreover, the law also helps chemical manufacturers to increase the efficiencies of their processes.

When Should You Start To Balance A Chemical Equation?

As soon as you derive a chemical equation stating the reactants and the products, check out if the number of atoms on either side are equal to each other or not. In the event that you detect the numbers to be uncommon, rest assured, you should start balancing the elements and compounds on either side of the chemical equation.

How Should You Balance A Chemical Equation?

The primary aspect that you need to keep in mind while balancing a chemical equation is this; the entire process is completely based on trial and error. When you start to balance a particular chemical equation, you will need to go through several processes before you stumble upon the right coefficients to balance the number of atoms.

Another aspect that you need to remember is that balancing chemical equations requires a lot of practice. Once you perfect the practice of balancing, you can become completely reliant on your intuition to lead you through the complete process.

While balancing your equations, you need to follow certain simple stems. Here’s what you need to do:

• Start by counting the number of atoms, present for each element on the side of the reactants as well as the products.
• When you find out that certain elements are not balanced, place the required coefficient that is needed to balance the elements.
• Once you are done with this, check out if the number of atoms for the other elements is also equal on both the sides.
• Repeat the process until you find out that all the elements on both the sides of the chemical equations are balanced.

As aforementioned, the process in itself is quite simple. However, it takes significant practice before can start to balance these equations completely with your intuition.

An Easy Example To Get You Started With

Now that you know the steps, you are wholly capable of balancing chemical equations. Let’s solve some of them, shall we? With the help of above-mentioned steps and a practical example, you will be better able to understand how the entire process works.

Do not feel anxious if you feel that you are still not ready to solve these problems. With our method, even your toddler sibling will be able to understand how chemical equations are balanced. And if still feel a tad bit confused after solving all these equations, try to solve a few more of such problems. Remember what we advised in a previous section: You will need significant practice before you can confidently start to balance these equations with your intuition.

Let’s start with this example. This equation represents a reaction between two Iron Oxide (Fe 2 O 3 ) and Carbon (C). The products formed are Iron (Fe) and Carbon Dioxide (CO 2 ).

Fe 2 O 3 + C        →       Fe + CO 2

Alright, so we have our equation. Let’s begin to balance the equation with the help of the steps mentioned above.

Step 1: Start by counting the number of atoms present, for each element on the side of the reactants as well as the products.

On the reactants side, we have:

• 2 atoms of Fe
• 3 atoms of O
• 1 atom of C

On the product side, we have:

• 1 atom of Fe
• 2 atoms of O

By comparing the number of atoms present for each element on each side, you might have determined that the reaction is obviously not balanced. Therefore, let’s move on to Step 2.

Step 2: When you find out that certain elements are not balanced, place the required coefficient that is needed to balance the elements.

Let’s start by balancing the oxygen atoms. To do this, make the oxygen atoms as six on either side of the chemical equation.

2Fe 2 O 3 + C      →         Fe + 3CO 2

On towards the next step now.

Step 3: Once you are done with this, check out if the number of atoms for the other elements is also equal on both the sides.

Now that we have an equal number of oxygen atoms on either side of the equation, let’s check out if the other elements of the equation are equal or not.

2Fe 2 O 3 + C      →        Fe + 3CO 2

On the reactant side, we have:

• 4 atoms of Fe.
• 6 atoms of O.
• 1 atom of C.
• 1 atom of Fe.
• 3 atoms of C.

As you can see, the elements of iron and carbon are still not balanced. Therefore, it is time that we move on to the 4 th step.

Step 4: Repeat the process until you find out that all the elements on both the sides of the chemical equations are balanced.

Alright, let’s start balancing the equation again and this time, let’s balance the number of iron atoms first. On the reactant side, we have 4 atoms of Fe while the product side has 1 atom of Fe. To balance them, we need to place 4 atoms of Fe on the product side.

2Fe 2 O 3 + C      →        4Fe + 3CO 2

Now, on the reactant side we have:

And, on the product side, we have:

The only element that remains to be balanced now is carbon. This can be easily done considering the fact that carbon exists only in a singular form on the reactant side. In order to correct this, we need to place 3 atoms of carbon on the reactant side. The chemical reaction, hence, will turn out to be:

2Fe 2 O 3 + 3C    →         4Fe + 3CO 2

And there you go. Perfectly balanced as all things should be (Yes. We are Marvel fanboys as well).

Essential Tips for Beginners

As you become further acquainted with balancing chemical equations, it becomes quite easy for you to solve them. However, it still maintains a certain level of difficulty at the beginner level. As a result of this, you might find yourself shying away from the equations and procrastinating to the level where you get totally and utterly repulsed by them.

However, there are certain tips that help you during such a stage. When you are beginner, you will be solving quite easy problems compared to those you might see in your Chemistry books. During such times, you will need to keep two essential tips in your mind. These tips will help you to easily balance the equations with ease. These tips are:

• Start Balancing With Single Elements – Attempt at balancing those elements first which occur in the form of a single molecule first. Owing to their single nature, they are easily flexible and their coefficient can be easily changed as and when needed in further steps.
• Balance the Hydrogen and Oxygen Molecules at the End – At the beginning, you will come across a lot of equations involving hydrogen and oxygen molecules. Whenever you encounter these, you should interact with these at the end. This is because hydrogen and oxygen molecules often occur together in both the reactant and product side. Once you are done with balancing other elements, focus on these.

Format for Writing a Balanced Equation

Now that you have balanced the assigned chemical reaction, you might be wondering if there is a format for writing these balanced chemical equations. In actuality, there is not said format that you need to mind for arranging the balanced equation. However, it has also been noticed that people in the field of chemistry often prefer to write solid elements and other compounds first, followed by the gaseous elements and single elements. This often acts as an unwritten rule which is followed by a lot of people around the world.

The Coefficients in a Balanced Chemical Equation

Up until this point of balancing your chemical equations, you might have known about the various facets surrounding the chemical equation. But there is still one significant aspect of balancing which we haven’t discussed: The role of coefficients while balancing equations.

At some point or another, you might have certainly wondered how are these coefficients be used while balancing the equation. After all, we cannot magically create or destroy elements during a chemical reaction. The Law of Conservation of Mass prevents this. In actuality, these coefficients define the ratios. For the reactant side, the coefficients define the ratio in which the substances are being used. And for the product side, the coefficients define the ratio in which the substances are being produced.

What a Balanced Chemical Equation Does Not Tell Us

Balanced chemical equations are highly informative in nature. They divulge a lot of information which is implemented for deriving the desired results from the reactions. However, there are certain aspects which balanced chemical equations don’t make you aware of just by solving the equations. The most prominent aspects amongst these are the subscripts used.

Take, for example, the last chemical equation which we balanced.

Now, if you notice, the element Fe has the subscript 2 beside itself, signifying the number of atoms. But if you notice on the product side, element lacks any subscript. This is quite similar to the oxygen element as well. On one hand, it has the subscript 3 while it has the subscript 2 on the other hand.

In spite of all this, the total mass of the individual atoms present on both sides of the equation is equal to each other. This is due to the Law of Conservation of Mass which ensures that matter isn’t created nor destroyed during a chemical reaction. This is also the reason why the total number of individual atoms are equal on both the reactant and product side.

Rules for Balancing Chemical Equations

By this point, you might have become nicely acquainted with balancing chemical equations on your own. Resulting, the rules associated with balancing chemical equations must also have become imprinted within your mind. It is with the help of such rules that you can easily balance the assigned chemical equations. However, it is equally important that you put these rules on paper and revise them once thoroughly.

Here are a few of the most prominent rules, include:

• Keep The Placement of Reactants and Products in Mind – In every chemical equation, there are two parts to an equation. These parts are separated by an arrow. While writing down the chemical equation, take care to list all the reactants on the left-hand side of the arrow. Similarly, you should take care to list all the products on the right side of the arrow.
• Ensure That The Right Arrow Is Placed – In most cases, the reactants and the products are separated by a single-sided arrow. This signifies a reaction which is irreversible or is unchangeable after a certain stage. However, in certain situations, the reactions occur at equilibrium. This means that reaction at any forward rate results in a reverse reaction. In such situations, the arrow used is two-sided, i.e. facing towards the reactants and the products.
• Emphasize on The Law of Conservation of Mass – While balancing the equations, it is of a predominant nature that you keep applying the Law of Conservation of Mass. This is because matter can neither be produced nor destroyed. Keeping this law in mind greatly helps you while balancing equations. Whenever you find an element which has more or less number of molecules, you can easily place a coefficient to balance it.
• Start With Independent Elements – When you start to balance the equation, start by balancing the independent elements. These are the elements which appear in individually in the equation. If there is no such element or if these elements are already balanced, proceed with the elements that exist in conjunction with other elements. Once this particular element is balanced, you should proceed on to balance other elements until all the elements are balanced.
• Balanced Only With Coefficients – While balancing the chemical equations, balance them only by placing coefficients in front of them. By no means should you add subscripts because this will completely change the formula of the particular reactant or compound, causing a change in the entire meaning that the equation wants to render.

Balancing Chemical Equations with Matrices

Up until this point, you have been balancing chemical equations by the means of trial and error. The process was simple, you had to place a coefficient, check if the other elements were balanced or not, and repeat all the steps until you had all the elements balanced.

However, it won’t be long before you face even tougher balancing problems. And you will face innumerous problems while using the trial and error method for such tough equations. Therefore, on such occasions, you will need a more versatile method for solving the problems.

Fortunately, there is one such methodology for solving chemical equations. This method involves a matrix which you can use to easily solve even the toughest of equations. Here are the steps that you should follow while solving chemical equations:

• Start by placing an alphabet which acts as a variable coefficient for your elements.
• Arrange all the elements in a column matrix format, as per the subscript values.
• Solve each of these matrices and generate the various equations.
• Individually equate all these equations and place the values generated into the other equations that you generated in Step 4.
• Assume a particular number for each of the values, such that, neither of the values that you derive appear in the form of a fraction and use this number to find out the values of the other coefficients.
• Finally, place these values into the initial chemical reaction to derive your balance equation.

Let’s use a simple example to understand this process. Take this chemical equation for instance:

NO + O 2          →         NO 2

Now, this is quite a simple equation. In fact, you might have even figured out how to balance this equation. In spite of this, we will use a simple methodology to help you understand how the entire process works.

Step 1: Start by placing an alphabet which acts as a variable coefficient for your elements

You can use any alphabet as a variable coefficient. For our purpose, we will be using alphabets X, Y, and Z. We will be placing them in this order:

X NO + Y O 2   →         Z NO 2

Step 2: Arrange all the elements in a column matrix format, as per the subscript values.

You should always follow a format for arranging the elements in a column matrix format. First, start by counting the number of atoms present for every individual occurrence of each element. From our first equation, we can derive that:

No. of N atoms = 1 + No. of N atoms = 0 → No. of N atoms = 1

No. of O atoms = 1 + No. of O atoms = 2 → No. of O atoms = 2

According to this format, we will separate the values of each of the elements according to the number of atoms present. Each of these positions will display a value depending on the number of those elements at that particular location. Hence, this is how we will display the values of the elements that are separated into the form of matrices:

X  + Y     →         Z

Notice that value signifying the elements show that each of the elements acquires a particular row. In essence, the nitrogen element acquires the first row while oxygen acquires the second row.

Step 3: Solve each of these matrices and generate the various equations

Once you have the matrices, you need to solve them and generate the required equations for them. The equations that you generate, generally, depending on the number of elements present within the equation. In this case, we have two elements. Therefore, the equations that formed are:

• X + Y0 = Z or X = Z (Equation i)
• X + 2Y = 2Z (Equation ii)

Step 4: Individually equate all these equations and place the values generated into the other equations that you generated in Step 4.

We have already generated the value of the coefficient X in Equation i. The value of X that we have generated is Z. Therefore, it is time that we focused on Equation ii.

X + 2Y = 2Z

According to Equation i, X = Z. Therefore,

• Z + 2Y = 2Z
• 2Y = 2Z – Z
• Y = ½Z             (Equation iii)

Step 5: Assume a particular number for each of the values, such that, neither of the values that you derive appears in the form of a fraction and use this number to find out the values of the other coefficients.

Once we have generated the final equations, it is time that we used them to generate the final values for our coefficients. In order to do this, we need to assume a particular value for each of the variable coefficients, such that the result does not turn out to be a fractional value.

Let’s start by assuming that the value of Z = 1. If Z = 1, then Y = 1/2 (according to the Equation iii). However, we don’t want a fractional value as our result. Therefore, let’s assume that Z = 2. Now that Z = 2, therefore Y = 1. Resultingly, the value of X = 2, since X = Z (as per equation i).

Step 6: Finally, place these values into the initial chemical reaction to derive your balance equation.

The equation which we had at the beginning, was:

According to the results generated by, the value of the variable coefficients stand as per the following:

Let’s place these values into the equation. Upon doing so, we get:

2NO + O 2        →         2NO 2

Therefore, on the reactant side, we have:

• 2 atoms of N
• 4 atoms of O

And on the product side, we have:

• 2 atoms of N.
• 4 atoms of O.

As there you have it again. A perfectly balanced chemical equation solved with the help of matrices.

Balancing Chemical Equations with Odd Number of Atoms on Elements

Another area wherein balancing becomes a tricky affair is during the presence of odd subscripts or atoms of an element. Let us take into consideration, this particular equation:

NH­­­ 3 + O 2         →         NO + H 2 O

The first thing that you will want to do in such cases is to balance those elements which are present in odd numbers on one side but are present in even numbers on the other side of the chemical equation. In this case, we have hydrogen following such a suit. Let us balance this out first.

2NH­­­ 3 + O 2       →         NO + 3H 2 O

Now, we need to balance nitrogen to equate the reaction.

2NH­­­ 3 + O 2       →         2NO + 3H 2 O

At this point, all the elements present in our chemical equations are balanced… except for oxygen. Hence, you will need to find out a coefficient which can effectively help you to balance the oxygen molecule present on the left-hand side of the reaction. On the reactant side, we have 2 oxygen molecules while on the product side, we have 5 oxygen molecules. Therefore, we will need to find a number which, when multiplied by 2, gives us 5 as the answer. Let this number be x.

Therefore, let us place this value into the equation.

2NH­­­ 3 + 5/2O 2 →         2NO + 3H 2 O

Finally, we need to eliminate the fractional part of the equation. Let’s do so by multiplying the entire chemical equation with 2.

4NH­­­ 3 + 5O 2     →         4NO + 6H 2 O

And there you have it. The equation becomes perfectly balanced.

A Few Examples worth Mentioning

Now that you have covered everything that is to be learned about the basics of balancing chemical equations, you should get yourself acquainted with certain worthwhile chemical equations.

• Chemical Reaction for Photosynthesis

6CO 2 + 6H 2 O              →        C 6 H 12 O 6 + 6O 2

• Chemical Reaction for Cellular Respiration

C 6 H 12 O 6 + 6O 2                        →         CO 2 + H 2 O + ATP

• Chemical Reaction for Ammonium Nitrate and Water

NH 4 NO 3 + Water       →         NH 4 + NO 3

• Chemical Reaction for Magnesium and Hydrochloric Acid

Mg + HCl       →         MgCl 2 + H 2

• Chemical Reaction for Lithium and Water

2 Li + 2H 2 O    →         2 LiOH + H 2

• Chemical Reaction for Calcium Carbonate and Hydrochloric Acid

CaCO 3 + HCl →         CaCl 2 + H 2 O

Using Games and Apps to Learn About Balancing Chemical Equations

It has not escaped our sights that a technologically-savvy world such as ours often uses technological means to better understand any newer concepts that they come across. Keeping this factor in mind, we have brought for you two of the greatest means by which you can enhance your skills at balancing chemical equations while simultaneously enjoying it via your smartphones of computers. Here are the means:

• Balancing Chemical Equations – We often encounter situations in which, whatever we do, we fail to solve the equation that has presented itself to us. And let’s be honest, all of us have been there at some point in our lives. It is in such situations that you might find the need for additional help. And this is exactly what Balancing Chemical Equations aims to do. With the help of this application, you will be easily able to balance the toughest of chemical equations. All that you need to do is to enter the unbalanced reactants and products and by clicking a button, the app displays the balanced chemical equation. You can find the Balancing Chemical Equations application on Google Play for free. Here’s a link for the same.

2. The Balancing Equations Game from PHET – Now, an application can only go so far as to keep you engaged. But this is completely contrary to what games can do at keeping you engaged. One of the most engaging games comes from PHET. At their website, you will find the Balancing Equations Game. Upon choosing the option, you are redirected towards a screen for choosing the difficulty of the game. This game is quite interesting. Having tried it out ourselves, we can assure you that not only is it engaging and entertaining, but it is quite informative as well. Therefore, it is one game that you should play if you want to get better at balancing chemical equations and get entertained for a while. Here’s a link to their website.

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How to Balance Equations - Printable Worksheets

Balancing Equations Worksheets

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A balanced chemical equation gives the number and type of atoms participating in a reaction, the reactants, products, and direction of the reaction. Balancing an unbalanced equation is mostly a matter of making certain mass and charge are balanced on the reactants and products side of the reaction arrow. This is a collection of printable worksheets to practice balancing equations. The printable worksheets are provided in pdf format with separate answer keys.

Balancing Chemical Equations - Worksheet #1 Balancing Chemical Equations - Answers #1 Balancing Chemical Equations - Worksheet #2 Balancing Chemical Equations - Answers #2 Balancing Chemical Equations - Worksheet #3 Balancing Chemical Equations - Answers #3 Balancing Equations - Worksheet #4 Balancing Equations - Answer Key #4

I also offer printable worksheets for balancing equations on my personal site. The printables are also available as PDF files:

Balancing Equation Practice Sheet  [ answer sheet ]​ Another Equation Worksheet [ answer sheet ] Yet Another Printable Worksheet [ answer key ]

You may also wish to review the step-by-step tutorial on how to balance a chemical equation .

Online Practice Quizzes

Another way to practice balancing equations is by taking a quiz.

Coefficients in Balanced Equations Quiz Balance Chemical Equations Quiz

• Printable Chemistry Worksheets
• A List of Common General Chemistry Problems
• Balancing Chemical Equations
• How to Balance Chemical Equations
• Balanced Equation Definition and Examples
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• Mole Relations in Balanced Equations
• Examples of 10 Balanced Chemical Equations
• 5 Steps for Balancing Chemical Equations
• Balancing Equations Test Questions
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Balancing Chemical Equations – Free Worksheets

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This FREE Chemistry Packet includes printable worksheets which introduce students to Balancing Chemical Equations . The answer keys are also provided!

The next two worksheets have students practice balancing chemical equations .

Count the atoms on each side. Change the coefficient of one of the substances. Recount the numbers of atoms again to determine if each side is balanced, if it is not change another coefficient. Repeat the process until the two sides balance.

The final page covers synthesis, decomposition and combustion reactions . Students practice balancing these reactions and determining which type of reaction it is.

synthesis reaction: In this reaction, a new compound is formed by the combination of simpler reactions.

decomposition In this reaction, a reactant breaks down into simpler products, which could be elements or other compounds. These can be thought of as the reverse of synthesis reactions.

combustion In this reaction, one reactant is always oxygen and another reactant often contains carbon and hydrogen. The carbon and hydrogen atoms combine with the oxygen, producing carbon dioxide and water.

This Balancing Chemical Equations Packe t is FREE to download! I hope it is helpful. I have also added this packet to both Chemistry BUNDLES. To see more about our Chemistry Units be sure to visit our Chemistry BUNDLE page (with lots more pictures and details) or scroll down below. Our chemistry packets are also sold separately.

Our packets are all PDF digital downloads .

The Balancing Chemical Equations Worksheet Set is free! Your order email from SendOwl (the automatic delivery service I use) may say “Thank you for your order” or “Thank you for your purchase” or something similar, but it does not cost anything.

If you have any questions, feel free to email me ! I hope this set is helpful! ~Liesl

Balancing Chemical Equations – Free Worksheet Set

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Be sure to check your PayPal email address for the download link. Feel free to email me with any questions you have! ~Liesl

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• Chemistry Concept Questions and Answers

Balanced Chemical Equations Questions

Chemical equations are symbolic representations of chemical reactions that express the reactants and products in terms of their respective chemical formulae. They also use symbols to represent factors such as reaction direction and the physical states of the reacting entities.

Balanced Chemical Equations Chemistry Questions with Solutions

Q1. A balanced chemical equation is in accordance with-

• Multiple proportion
• Reciprocal proportion
• Conservation of mass
• Definite proportions

Correct Answer: (c) Law of Conservation of Mass

Q2. The correct balanced equation for the reaction __C 2 H 6 O + __O 2 → __CO 2 + __H 2 O is-

• 2C 2 H 6 O + O 2 → CO 2 + H 2 O
• C 2 H 6 O + 3O 2 → 2CO 2 + 3H 2 O
• C 2 H 6 O + 2O 2 → 3CO 2 + 3H 2 O
• 2C 2 H 6 O + O 2 → 2CO 2 + H 2 O

Correct Answer: (b) C 2 H 6 O + 3O 2 → 2CO 2 + 3H 2 O

Q3. The correct balanced equation for the reaction __KNO 3 + __H 2 CO 3 → __K 2 CO 3 + __HNO 3 is-

• 2KNO 3 + H 2 CO 3 → K 2 CO 3 + 2HNO 3
• 2KNO 3 + 2H 2 CO 3 → K 2 CO 3 + 2HNO 3
• KNO 3 + H 2 CO 3 → K 2 CO 3 + 2HNO 3
• 2KNO 3 + 2H 2 CO 3 → K 2 CO 3 + 3HNO 3

Correct Answer: (a) 2KNO 3 + H 2 CO 3 → K 2 CO 3 + 2HNO 3

Q4. The correct balanced equation for the reaction __CaCl 2 + __Na 3 PO 4 → __ Ca 3 (PO 4 ) 2 + __ NaCl is-

• 2CaCl 2 + 2Na 3 PO 4 → 2Ca 3 (PO 4 ) 2 + NaCl
• CaCl 2 + Na 3 PO 4 → Ca 3 (PO 4 ) 2 + NaCl
• 3CaCl 2 + 2Na 3 PO 4 → Ca 3 (PO 4 ) 2 + 6NaCl
• 3CaCl 2 + 2Na 3 PO 4 → Ca 3 (PO 4 ) 2 + 3NaCl

Correct Answer- (c) 3CaCl 2 + 2Na 3 PO 4 → Ca3(PO 4 ) 2 + 6NaCl

Q5. The correct balanced equation for the reaction __TiCl 4 + __H 2 O → __TiO 2 + __HCl is-

• TiCl 4 + 2H 2 O → TiO 2 +2HCl
• TiCl 4 + 2H 2 O → TiO 2 + 4HCl
• 2TiCl 4 + H 2 O → 2TiO 2 + HCl
• TiCl 4 + 4H 2 O → TiO 2 + 4HCl

Correct Answer- (b) TiCl 4 + 2H 2 O → TiO 2 + 4HCl

Q6. Write a balanced equation for the reaction of molecular nitrogen (N 2 ) and oxygen (O 2 ) to form dinitrogen pentoxide.

Answer. The equation for the reaction is-

N 2 + O 2 → N 2 O 5 (unbalanced equation)

The balanced chemical equation is-

2N 2 + 5O 2 → 2N 2 O 5

Q7. On what basis is a chemical equation balanced?

Answer. A chemical equation is balanced using the law of conservation of mass, which states that “matter cannot be created nor destroyed.”

Q8. What is the balanced equation for the reaction of photosynthesis?

Answer. The balanced chemical equation for the reaction of photosynthesis is-

6CO 2 + 6H 2 O → C 6 H 12 O 6 + 6O 2 .

Q9. We must solve a skeletal chemical equation.” Give a reason to justify the statement.

Answer. Skeletal chemical equations are unbalanced. Due to the law of conservation of mass, we must balance the chemical equation. It states that ‘matter cannot be created or destroyed.’ As a result, each chemical reaction must have a balanced chemical equation.

Q10. What does it mean to say an equation is balanced? Why is it important for an equation to be balanced?

Answer. The chemical equation must be balanced in order to obey the law of conservation of mass. A chemical equation is said to be balanced when the number of different atoms of elements in the reactants side equals the number of atoms in the products side. Balancing chemical equations is a trial-and-error process.

Q11. What is meant by the skeletal type chemical equation? What does it represent? Using the equation for electrolytic decomposition of water, differentiate between a skeletal chemical equation and a balanced chemical equation.

Answer. Skeletal equations are those in which formulas are used to indicate the chemicals involved in a chemical reaction.

The law of conservation of mass does not apply to skeletal equations.

The chemical formulas are represented by balanced chemical equations, which follow the law of conservation of mass, which states that the atoms on the reactant and product sides are the same.

H 2 O → H 2 + O 2 : Skeletal equation

2H 2 O → 2H 2 + O 2 : Balanced chemical equation

Q12. Write the balanced chemical equation for the following reaction:

• Phosphorus burns in presence of chlorine to form phosphorus pentachloride.
• Burning of natural gas.
• The process of respiration.
• P 4 + 10Cl 2 → 4PCl 5
• CH 4 +2O 2 → CO 2 +2H 2 O + heat energy
• C 6 H 12 O 6 + 6O 2 + 6H 2 O → 6CO 2 + 12H 2 O + energy

Q13. What Is the Distinction Between a Balanced Equation and a Skeleton Equation?

Answer. The primary distinction between a balanced equation and a skeleton equation is that the balanced equation provides the actual number of molecules of each reactant and product involved in the chemical reaction, whereas a skeleton equation only provides the reactants. Furthermore, a balanced equation may or may not contain stoichiometric coefficients, whereas a skeleton equation does not.

Q14. Balance the equations

• HNO +Ca(OH) 2 → Ca(NO 3 ) 2 + H 2 O
• NaCl + AgNO 3 → AgCl + NaNO 3
• BaCl 2 +H 2 SO 4 → BaSO 4 +HCl

Answer. The balanced chemical equation for the reactions are as follows-

• 2HNO 3 + Ca(OH) 2 → Ca(NO 3 ) 2 + 2H 2 O
• BaCl 2 +H 2 SO 4 → BaSO 4 + 2HCl

Q15. Write a balanced molecular equation describing each of the following chemical reactions.

• Solid calcium carbonate is heated and decomposes to solid calcium oxide and carbon dioxide gas.
• Gaseous butane, C 4 H 10 , reacts with diatomic oxygen gas to yield gaseous carbon dioxide and water vapour.
• Aqueous solutions of magnesium chloride and sodium hydroxide react to produce solid magnesium hydroxide and aqueous sodium chloride.
• Water vapour reacts with sodium metal to produce solid sodium hydroxide and hydrogen gas.
• CaCO 3 → CaO + CO 2

On heating, 1 mol of solid calcium carbonate yields 1 mol of calcium oxide and 1 mol of carbon dioxide gas.

• 2C 4 H 10 +13O 2 → 8CO 2 + 10H 2 O When 2 moles of butane gas react with 13 moles of diatomic oxygen gas, 8 moles of carbon dioxide gas and 10 moles of water vapours are produced.
• MgCl 2 + 2NaOH → 2NaCl + Mg(OH) 2

1 mol magnesium Cordelia reacts with two moles of sodium hydroxide to produce two moles of aqueous sodium chloride solution and one mole of solid magnesium hydroxide.

• 2H 2 O + 2Na → 2NaOH + H 2

2 moles of water vapour react with 2 moles of sodium metal, yielding 2 moles of solid sodium hydroxide and 1 mol of hydrogen gas.

Practise Questions on Balanced Chemical Equations

Balance the following equations-

1. (NH 4 ) 2 Cr 2 O 7 (s) → Cr 2 O 3 (s) + N 2 (g) + H 2 O(g)

2. Ca(OH) 2 + H 3 PO 4 → Ca 3 (PO 4 ) 2 + H 2 O

3. FeCl 3 + NH 4 OH → Fe(OH) 3 + NH 4 Cl

4. Al 2 (CO 3 ) 3 + H 3 PO 4 → AlPO 4 + CO 2 + H 2 O

5. S 8 + F 2 → SF 6

Click the PDF to check the answers for Practice Questions. Download PDF

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Balancing Chemical Equations Quiz – Questions and Answers

Here is a ten-question balancing chemical equations quiz. Each question presents an unbalanced equation. Select the balanced equation. Find the answer key below the questions. Remember, the number of each type of atoms is the same on both sides of the reaction arrow when an equation is balanced.

Balancing Chemical Equations Quiz Questions

(1) __ Na₃PO₄ + __ HCl → __ NaCl + __ H₃PO₄

• Na₃PO₄ + HCl → NaCl + H₃PO₄
• Na₃PO₄ +3 HCl → 3 NaCl + H₃PO₄
• 3 Na₃PO₄ + HCl → 3 NaCl + H₃PO₄
• Na₃PO₄ + 3 HCl → NaCl + H₃PO₄

(2) __ TiCl₄ + __ H₂O → __ TiO₂ + __ HCl

• TiCl₄ + 2 H₂O → TiO₂ + 2 HCl
• TiCl₄ + 2 H₂O → TiO₂ + 4 HCl
• 2 TiCl₄ + H₂O → 2 TiO₂ + HCl
• TiCl₄ + 4 H₂O → TiO₂ + 4 HCl

(3) __ C₂H₆O + __ O₂ → __ CO₂ + __ H₂O

• 2 C₂H₆O + O₂ → CO₂ + 3 H₂O
• C₂H₆O + 3 O₂ → 2 CO₂ + 3 H₂O
• C₂H₆O + 2 O₂ → 3 CO₂ + 3 H₂O
• 2 C₂H₆O + O₂ → 2 CO₂ + H₂O

(4) __ FeS + __ O₂ → __ Fe₂O₃ + __ SO₂

• 2 FeS + O₂ → 2 Fe₂O₃ + 2 SO₂
• FeS + O₂ → Fe₂O₃ + SO₂
• 3 FeS + 2 O₂ → 3 Fe₂O₃ + 2 SO₂
• 4 FeS + 7 O₂ → 2 Fe₂O₃ + 4 SO₂

(5) __ CaCl₂ + __ Na₃PO₄ → __ Ca₃(PO₄)₂ + __ NaCl

• 2 CaCl₂ + 2 Na₃PO₄ → 2 Ca₃(PO₄)₂ + NaCl
• CaCl₂ + Na₃PO₄ → Ca₃(PO₄)₂ + NaCl
• 3 CaCl₂ + 2 Na₃PO₄ → Ca₃(PO₄)₂ + 6 NaCl
• 3 CaCl₂ + 2 Na₃PO₄ → Ca₃(PO₄)₂ + 3 NaCl

(6) __ KOH + __ H₃PO₄ → __ K₃PO₄ + __ H₂O

• 3 KOH + 2 H₃PO₄ → 3 K₃PO₄ + 3 H₂O
• KOH + H₃PO₄ → K₃PO₄ + 6 H₂O
• 3 KOH + H₃PO₄ → K₃PO₄ + 3 H₂O
• 2 KOH + H₃PO₄ → K₃PO₄ + H₂O

(7) __ AgI + __ Na₂S → __ Ag₂S + __ NaI

• AgI + Na₂S → Ag₂S + 2 NaI
• 2 AgI + 2 Na₂S → 2 Ag₂S + 2 NaI
• 2 AgI + 2 Na₂S → Ag₂S + 2 NaI
• 2 AgI + Na₂S → Ag₂S + 2 NaI

(8) __ Ba₃N₂ + __ H₂O → __ Ba(OH)₂ + __ NH₃

• 2 Ba₃N₂ + 3 H₂O → 2 Ba(OH)₂ + 2 NH₃
• Ba₃N₂ + 6 H₂O → 3 Ba(OH)₂ + 2 NH₃
• Ba₃N₂ + 3 H₂O → 3 Ba(OH)₂ + 2 NH₃
• Ba₃N₂ + H₂O → Ba(OH)₂ + NH₃

(9) ___ SnO₂ + ___ H₂ → ___ Sn + ___ H₂O

• 2 SnO₂ + 2 H₂ → 2 Sn + H₂O
• SnO₂ + 2 H₂ → Sn + 2 H₂O
• SnO₂ + H₂ → Sn + 2 H₂O
• 2 SnO₂ + H₂ → 2Sn + H₂O

(10) __ KNO₃ + __ H₂CO₃ → __ K₂CO₃ + __ HNO₃

• 2 KNO₃ + H₂CO₃ → K₂CO₃ + 2 HNO₃
• 2 KNO₃ + 2 H₂CO₃ → K₂CO₃ + 2 HNO₃
• KNO₃ + H₂CO₃ → K₂CO₃ + HNO₃
• 2 KNO₃ + 2 H₂CO₃ → K₂CO₃ + 3 HNO₃

Balancing Chemical Equations Quiz Answers

Learn more about balancing equations.

If you had trouble with this quiz, it’s a good idea to review the steps of balancing chemical equations.

• Guide to Balancing Chemical Equations – Learn the steps for balancing chemical equations and see how to check your work.
• Examples of Balanced Equations – Not sure what a balanced equation looks like? Here are some examples.
• Practice Worksheet – If you want more practice, try worksheets! Print worksheets out and improve your skills.

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Balancing, Identifying & Predicting Chemical Equations Quiz

This online quiz is intended to give you extra practice in balancing, identifying and predicting a random selection of over 150 chemical equations. This quiz aligns with the following NGSS standard(s): HS-PS1-2 , HS-PS1-7

Select your preferences below and click 'Start' to give it a try!

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