Identify three types of chemical weathering by their descriptions. Then give an example of each?

Answer 1

1. oxidation - a reaction with oxygen to form an oxide. An example of oxidation is rust. When iron reacts with oxygen, it forms iron oxide(rust).
2. hydrolysis - a reaction with water. The most common example of hydrolysis is feldspar, which can be found in granite changing to clay. When it rains, water seeps down into the ground and comes in contact with granite rocks. The feldspar crystals within the granite react with the water and are chemically altered to form clay minerals, which weaken the rock.
3. carbonation - a reaction with CO2 to form a carbonate acid. Limestone caves are an example of carbonation weathering.

Answer 2

1. Hydrolysis: Involves the breakdown of minerals due to reaction with water, forming new compounds. An example is the hydrolysis of feldspar to form clay minerals.

2. Oxidation: Involves the reaction of minerals with oxygen, causing them to rust or corrode. An example is the oxidation of iron in minerals like pyrite to form iron oxide.

3. Carbonation: Involves the dissolution of minerals by carbonic acid, often found in rainwater. An example is the carbonation of limestone to form calcium bicarbonate.