ICSE Class 8 Chemistry Question 7 of 13

Language of Chemistry — Question 10

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Question

Question 10

Differentiate between:

(a) Reactants and Products

(b) A balanced and an unbalanced chemical equation

Answer

(a) Differences between Reactants and Products

ReactantsProducts
The substances that are used as the starting material and which react with one another are called reactants.The substances which are formed as a result of the reaction are called products.
Reactants are written on the left hand side of the equation.Products are written on the right hand side of the equation.
In equation C + O2 ⟶ CO2, C and O2 are reactants.In equation C + O2 ⟶ CO2, CO2 is product.

(b) Differences between a balanced and an unbalanced chemical equation

Balanced chemical equationUnbalanced chemical equation
In balanced chemical equation the total number of atoms on the reactant side as well as the product side are equal.In unbalanced chemical equation the total number of atoms on the reactant side and product side are not equal.
Example:
Zn + H2SO4 ⟶ ZnSO4 + H2
Example:
H2 + O2 ⟶ H2O