Chemical weathering

Science

Definition

Chemical weathering is the breakdown of rocks through chemical reactions that alter the mineral composition of the rock. Common processes include oxidation, hydrolysis, carbonation, and acid reactions with minerals.

Examples

  • Iron in rocks reacts with oxygen and water to form rust (iron oxide), weakening the rock
  • Acid rain dissolves limestone and marble statues through carbonation reactions
  • Feldspar in granite undergoes hydrolysis to form clay minerals

Related Terms

Mechanical weathering Erosion and deposition Acid rain Rock cycle

Study This Concept

Practice chemical weathering with free review games in these units:

Earth Science Unit 4: Weathering and Erosion