What are the causes of chemical weathering?

First of all there are three types of chemical weathering; oxidation, dissolution and hydrolysis. The causes are: Water - its the most important cause of chemical weathering, Oxygen - its also an important cause, Carbon dioxide - dissolves in rain water, Living organisms - examples trees, Acid rain

Chemical weathering is the process by which a material breaks down into its component elements through the action of a chemical agent. This type of weathering requires precise temperature conditions and the presence of a chemically-laden fluid. Substances capable of causing chemical weathering include water and acids