Question

Give one method of preparation of quicklime

Answer 1

Calcination is a process that is used to prepare burnt lime. It is a process which kicks-off with thermally decomposing the reactants at high temperatures but ensuring that the temperature is maintained below the melting point. Calcium carbonate undergoes calcination at a temperature which ranges between 1070oC-1270oC. These reactions are held in a rotary kiln. The products formed due to the reaction are burnt lime and carbon dioxide. The carbon dioxide formed is removed immediately so that the reaction is preceded until the completion of the process in accordance with Le-Chatelier’s principle.
CaCO3 → CaO +CO2

This reaction is reversible and exothermic in nature in the forward direction.

Answer 2

CaCO₃→CaO + CO₂
thermal decomposition of limestone