Question

A student added too much of baking soda in a test tube containing 'x' subustance having the smell of vinegar

Answer 1

X is Ethanoic acid / acetic acid
A neutralisation reaction will take place.

CH3COOH + NaHCO3 -> CH3COONa + H2O + CO2

Answer 2

substance  x is ethanoic acid which reacts with sodium hydrogen carbonate and forms sodium ethanoate and carbon dioxide and water