Which of the following is an example of chemical weathering?

A. Water breaking rocks

B. Plant roots splitting rocks

C. Acid dissolving limestone

D. Wind breaking down rock

Answer: C. Acid dissolving limestone

In chemical weathering, particles are disintegrated by a series of chemical reactions. Reactions like acidification, hydrolysis, oxidation, and carbonation, tend to alter the chemical composition of minerals. In limestone, rain mixes with carbon dioxide to create carbonic acid. With this, carbonation occurs and this acid flows through the limestone. A reaction is formed and calcium bicarbonate is formed. This bicarbonate solution becomes soluble in the limestone and this in turn weathers the limestone and washes it away.

Chemistry

3 years ago

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