Question

introduction on determination of neutralisation of a reaction between solid sodium carbonate and hydrochloric acid

Answer 1

Explanation:

A Two-Stage Reaction Sodium hydrogencarbonate is basic, and it reacts with the HCl still in solution to produce sodium chloride, carbon dioxide and water. Phenolphthalein is a good indicator for the first reaction because it responds to the pH change caused by the formation of sodium hydrogencarbonate.