Chemical Weathering.
Chemical weathering is caused by rain water that is slightly acidic forming new materials (Clay.) and soluble salt. Chemical weathering needs water and works more effectively on higher temperature (Damp and warm climates.) There are different types of chemical weathering.
1) Solution = The rock gets remove by acidic rain. For example, limestone is worn away by rainwater having dissolved CO2. (This is sometimes called carbonation.)
2) Hydrolysis = The breaking down of rocks by acidic rain which produces clay and soluble salt.
3) Oxidation = The breaking down of rocks by oxygen and water, which often gives iron-rich rocks (Rusty coloured.)
1) Solution = The rock gets remove by acidic rain. For example, limestone is worn away by rainwater having dissolved CO2. (This is sometimes called carbonation.)
2) Hydrolysis = The breaking down of rocks by acidic rain which produces clay and soluble salt.
3) Oxidation = The breaking down of rocks by oxygen and water, which often gives iron-rich rocks (Rusty coloured.)