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Chemical Equation Balance

Chemical equation balance is the symbolic representation. The chemical reaction is form symbols and formulae wherever it balances right hand side with plus sign which and left hand side with product entities.

In the other form, The chemical reaction is a symbolic representation in which, reactants and products are expressed form. The symbols represent, the direction of reaction and physical states. The chemical reactions example is given below.

2H2+O2 = 2H2O

In this equation , right hand sides are chemical equation.

left hand sides are product.

The following steps are gives in chemical equation.

1.The substances undergoes reaction is known as reactants, and their formulas are left sides the equation.

2.The substances generates the reactions is also known products, formula are places on right sight equation.

3. Plus signs (+) separates individual reactant and product formulas, and arrow separates in the reactant and product.

4. The relative’s number reactant and product species coefficient.

Balancing equations

The chemical equation is describes as, the equal number of atoms to each elements involves the reaction and it is represents as reactant and product sides. this is requirements the equation must satisfy to be consistent with law of conservation of matter . It may be confirm simply the number of atoms . The number of atoms represents computes atom.

for examples , products species CO2 and H2O contains the element oxygen, and the numbers in oxygen atom on product sides is (1 CO2 molecule*2 O atoms/CO2 molecule)+(2H2O molecule|*1 O ATOM/H2O molecule)=4 O atoms


the ultimates goal for balancing chemical reaction is makes both sides reaction, the reactants and the products. this is equal number in atoms per element. this is stems are the universal law of conservation of mass, in which states that, the matter can not be creates nor destroy.

Basically, if we starts ten atoms in oxygen after a reaction. this means , chemical reactions are not changes actual building blocks in matters they change the arrangement on the blocks.

Chemical equation balance in practice

These 10 equations are gives. we starts with the elements shows the least and proceeds.

  • CO2+H2O=C6H12O6+O2
  • SiCl4+H2O=H4SiO4+HCl
  • Al+ HCl=AlCl3+H2
  • Na2CO3 + HCl → NaCl + H2O + CO2
  • C7H6O2 + O2 → CO2 + H2O

Complete solution in chemical equation balance


This is first balancing chemical solution in elements are both carbon and hydrogen fulfill this requirement. So we starts with carbons , There is only one atoms in carbon on left hand side. But six on the right hand side. So a coefficient in six on the carbon atoms containing molecules in the left.


There are two hydrogen atoms in left side and twelve atoms in right sides. So a coefficient in six on the hydrogen containing molecule on the left .

6CO2+6H2O= C6H12O6+O2

There are total eighteen oxygen molecules on the left. On the right sides eight oxygen molecule .Now we have two option to even out the right hand side. Here if we multiply C6H1206 or O2 in a coefficient.

If we change c6h12o6 the coefficient on left hand side, Consequently it also change. Because we changing the number of carbon and hydrogen atoms. Basically it helps to only change the molecule containing the elements .

Contrarily our final answer is :-


2. SiCl4+H2O=H4SiO4+HCl

In chemical equation balance the element are same sides on the equation is hydrogen. so we starts any other element . In silicon only one atom is if we adds any other coefficient on the right side.


Firstly we analysis all elements one side of the equation. Here only one oxygen atoms on the left and four atoms are right side. Then our final results is


3. Al+ HCl=AlCl3 +H2

A single atom is alone on side the equation, It is starts counting the aluminum atoms on both side. There is one left sides and one right sides.


There are now two on left and three on right. Although a coefficient to one side. chlorine atoms to be equation

Next, we will see at chlorine. There are now two on the left, but three on the right. Now, this is not as front inside as adding a coefficient to one side. We need the number of chlorine atoms to be equal on both sides, so we need to get two and three to be equal. We can accomplish this by finding the lowest common multiple. In this case, we can multiply two into three and three into two to get the least multiple of six. So, we will multiply 2HCl into three and AlCl3 into two:

Al + 6HCl → 2AlCl3 + H2

We see that at all the elements, So it is easy to say that we are done. However, Each makes sure to double check. Because we joints a coefficient to the aluminum-containing molecule on the right hand side, aluminum is no larger balance. There is one on the left but two on the right. So, we will add one more coefficient.

4. Na2CO3 + HCl → NaCl + H2O + CO2

Basically In this point, balancing equations is becoming easily and you are getting the hang of it. Looking at sodium, we see that it occurs two on the left, but one on the right. So, we can adds our first coefficient to the NaCl on the right.

Na2CO3 + HCl → 2NaCl + H2O + CO2

Next, we can see that carbon. There is one on the left and one on the right, so there are no coefficients to add. here oxygen occurs in more than one place on the left, we will exist it for last. During, this process in hydrogen. There is one on the left and two on the right, so we will joints a coefficient to the left.

Na2CO3 + 2HCl → 2NaCl + H2O + CO2

Accordingly, in chlorine we see that it is already balancing with two on each side. Now in backword to look at oxygen. There are three on the left and three on the right, so our final answer is

Na2CO3 + 2HCl → 2NaCl + H2O + CO2

5. C7H6O2 + O2 → CO2 + H2O

We have starts balancing this equation by looking at either carbon or hydrogen. Before carbon, we see that there are seven atoms on the left and only one on the right. So, we can add a coefficient of seven on the right.

C7H6O2 + O2 → 7CO2 + H2O

Then in hydrogen, there are six atoms on the left and two on the right. So, we will adds a coefficient of three on the right.

C7H6O2 + O2→ 7CO2 + 3H2O

Now, Oxygen occurs in every molecule in the equation. So we have to be very careful when balancing it. There are four atoms of oxygen on the left and seventeen on the right. There is no obvious way to balance these numbers, so we must use a little fractions. When writing our final answer, we cannot include fractions as it is not proper form, but it sometimes helps to use them to solve the problem. Also, try to avoid over-manipulating organic molecules. You can easily identify organic molecules, otherwise known as CHO molecules, because they are made up of only carbon, hydrogen, and oxygen. We don’t like to work with these molecules, there are rather complex. Also, larger molecules tend to be more stable than smaller molecules, and less likely to react in large quantities.

So, to balance out the four and seventeen, we can multiply the O2 on the left by 7.5. That will give us

C7H6O2 + 7.5O2 → 7CO2 + 3H2O

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