This is an example of dissolution of carbonates.
When carbon combines with minerals, it dissolves carbon. This transforms minerals that contain calcium, magnesium, potassium, and sodium. When rainwater attacks formations of limestone the constituent minerals dissolve and wash away with mildly acidic rainwater.
This is an example of Carbonation.
This chemical reaction involves conversion of carbon dioxide to give carbonates, bicarbonates, and carbonic acid.
This commonly happens when rainwater attacks formations of limestone resulting in the dissolution of the minerals in which it is washed away with the mildly acid rainwater.
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