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How to balance chemical equations?
A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae, wherein the reactant entities are given on the left-hand side and the product entities on the right-hand side.
For example, hydrogen gas (H2) can react (burn) with oxygen gas (O2) to form water (H2O). The chemical equation for this reaction is written as E.g. - H2 + O2 ⇒ H2O.
The '+' is read as 'reacts with' and the arrow '' means 'produces'. The chemical formulas on the left represent the starting substances, called reactants.
Balanced Chemical Equation: A balanced chemical equation has number atoms of each element equal on both left and right sides of the reaction.
In order to balance chemical equations, one has to balance all the atoms on the left and right side of the arrow.
For example: Mg + H2SO4 ⇒ MgSO4 + H2
left side : Mg = 1 right side: Mg=1
H =2 H=2
S = 1 S=1
O =4 O=4
As you can see that the elements on both left and right side have equal no. of atoms, therefore the equation is balanced.
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