Question

Explain the methods to prepare carbon dioxide.

Answer 1

1. On industrial scale it is produced by burning coke in excess of air.

2. Calcination of lime produces carbon dioxide as by product.

3. Carbon dioxide is prepared in laboratory by the action of dilute hydrochloric acid on metal carbonates.

CaCO₂ + 2HCl → CaCl₂ + H₂O + CO₂