Chapter 7, Problem 9A

Interpretation Introduction

Interpretation :

An unbalanced equation must be written for the thermal decomposition of calcium carbonate.

Concept Introduction :

Calcium carbonate undergoes thermal decomposition to produce calcium oxide and carbon dioxide.

Answer to Problem 9A

An equation for the thermal decomposition of calcium carbonate is given below.

  ${\text{CaCO}}_{\text{3}}\text{(s)}\stackrel{\mathrm{\Delta }}{\to }{\text{CaO(s)+CO}}_{\text{2}}\text{(g)}$

Explanation of Solution

The thermal decomposition reaction shows that 1 mol calcium carbonate produces 1 mol calcium oxide which is a solid residue along with one mole carbon dioxide which is a gas.

The reaction is represented as follows:

  ${\text{CaCO}}_{\text{3}}\text{(s)}\stackrel{\mathrm{\Delta }}{\to }{\text{CaO(s)+CO}}_{\text{2}}\text{(g)}$