chenucal weathering

What is chemical weathering?

Chemical weathering is the breakdown of rocks into smaller pieces of different minerals due to chemical reactions.

What is hydrolysis in the context of chemical weathering?

Hydrolysis is the reaction of minerals with water, often affecting feldspar and hornblende in rocks like granite and sandstone, changing them into clays.

What is carbonic acid and how is it formed?

Carbonic acid is formed when carbon dioxide in the atmosphere reacts with rainwater, producing a slightly acidic solution that can dissolve rocks made of minerals like calcite.

What reaction does carbonic acid have with limestone?

When carbonic acid infiltrates the ground, it reacts with limestone (CaCO3), dissolving it according to the reaction: $H_2CO_3 + CaCO_3 <br /> ightarrow H_2O + CO_2 + Ca^{2+}$.

What is acid rain?

Acid rain is rainwater that is more acidic than normal (pH < 6) due to sulfur dioxide or nitrogen dioxide reacting with water, producing sulfuric or nitric acid, which dissolves rocks more quickly.

What are organic/plant acids?

Organic acids, such as tannic acid from decaying leaves and pine needles, are produced by the decomposition of organic matter. They can dissolve minerals in rocks and contribute to chemical weathering.

What is oxidation in chemical weathering?

Oxidation occurs when minerals or rocks react with oxygen, leading to the rusting of iron-bearing minerals like magnetite, pyrite, hornblende, and biotite.