How does crushed limestone added to the lake reduce the acidity of the water?

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Limestone is made of calcium carbonate (CaCO3). It is found in sedimentary rock. It is very soluble in water and in weak acid. Many caves occur when water chemically erodes the limestone. If a lake has a low or acidic ph, crushed limestone will react to neutralize it directly. For...

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Limestone is made of calcium carbonate (CaCO3). It is found in sedimentary rock. It is very soluble in water and in weak acid. Many caves occur when water chemically erodes the limestone. If a lake has a low or acidic ph, crushed limestone will react to neutralize it directly. For example, when reacting with sulfuric acid, it forms calcium sulfate (CaSO4) plus H2CO3. The calcium sulfate is soluble in water and the limestone dissolves. Next the H2CO3 forms carbon dioxide gas and water. Therefore, the original acid in the first part of the reaction, which contained H ions, has been converted to water which is neutral.

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