# How to Balance a Chemical Equation

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## BALANCED CHEMICAL EQUATION

• Following the law of conservation of mass,
• The total mass of the elements present in the products of a chemical reaction has to be equal to the total mass of the elements present in the reactants.
• Or the number of atoms of each element remains the same, before and after a chemical reaction.

Example ;

• Here the Number of atoms of each element in reactant and product sides are equal.
• Hence, the above chemical equation is balanced.

## STEPS INVOLVED IN  BALANCING THE CHEMICAL EQUATION

• Step I:
• To balance a chemical equation, we have to draw boxes around each formula.
• Do not change anything inside the boxes while balancing the equation.

• Step II:
• List the number of atoms of different elements present in the unbalanced equation.
• Step III:
• Start balancing with the compound that contains the maximum number of atoms which may be reactant or product.
• Step IV: Fe and H atoms are still not balanced. now balance hydrogen in reaction.
• Step V: check the equation and balance the iron.
• Step VI: Finally, to check the correctness of the balanced equation, we count atoms of each element on both sides of the equation.
• The numbers of atoms of elements on both sides of the equation are equal.
• This equation is now balanced.
• This method of balancing chemical equations is called the hit-and-trial method.
• Step VII:
• Writing Symbols of Physical States. the physical states of the reactants and products are mentioned along with their chemical formulae.
• The gaseous, liquid, aqueous, and solid states of reactants and products are represented by the notations (g), (l), (aq), and (s), respectively.

• Note The word aqueous (aq) is written if the reactant or product is present as a solution in water. the symbol (g) is used with H2O to indicate that water is used in the form of steam.
• The reaction conditions, such as temperature, pressure, catalyst, etc., for the reaction are indicated above and/or below the arrow in the equation.

## Chemical Equation Balancer Calculator

How to Use the Calculator
• Write the Equation In the Below Box
• Write the Element Symbols Correctly.
• For Example, to Write Chlorine, You must write Cl and not CL.
• To write Sulphuric Acid Write H2SO4 and not H2So4 or H2so4.
• The answer is Presented Below.
• Just Scroll down to check the answer. 🙂

## IMPORTANT QUESTIONS AND ANSWERS:

Balancing chemical equation

1.Write a balanced chemical equation for the reaction between sodium chloride and silver nitrate indicating the physical state of the reactants and the products.

Ans:

2.Balance the following chemical equation : Pb(NO3)2(s) → PbO(s) + NO2(g) + O2(g)

ANS: 2Pb(NO3)2(s)→ 2PbO(s) + 4NO2(g) + O2(g)

3.Write balanced equations for the following mentioning the type of reaction involved.
(i) Aluminium + Bromine → Aluminium bromide
(ii) Calcium carbonate→ Calcium oxide + Carbon dioxide
(iii) Silver chloride→Silver + Chlorine
Answer.

## Balancing Chemical Equations More Examples

Na2CO3(s) + 2HCl(aq)  →2NaCl(aq) +H2O(l) + CO2 (g)

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