Question

The process of dissolving an acid or a base in water is a/an __________ reaction.

• A. exothermic
• B. endothermic
• C. oxidation
• D. reduction

Answer 1

The correct option is A exothermic

When an acid is dissolved in water, a large amount of heat energy is released due to the breaking of hydrogen bonds as a result of dissociation of acids in water.

This is the reason why it is advised to always add the concentrated acid to water with constant stirring rather than adding water directly to the sample of concentrated acid.