1.

A compound of carbon which has acidic characteristic is used as preservative of pickles. This compound reacts with carbonates and bicarbonates to release a colourless gas. Identify the compound and the gas. Give equations for the reactions also.

Answer»

The compound is ethanoic acid also known as acetic acid (CH3COOH). It is a weak organic acid. CH3COOH reacts with carbonates and bicarbonates to release CO2 which is a colourless gas.

The reactions involved are:

2CH3COOH + Na2CO3→ 2CH3COONa + CO2↑ + H2

CH3COOH + NaHCO3→ CH3COONa + CO2↑ + H2O



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