Answer:
Chemical weathering occurs when chemical reactions weaken and decompose rocks.
Step-by-step explanation:
This process involves a chemical change, which actually alters the rock's or mineral's chemical composition. Mostly caused by rain water reacting with the mineral grains in rocks to form new minerals (clays) and soluble salts. Water is the most important agent of chemical weathering. Two other important agents of chemical weathering are carbon dioxide and oxygen.