How does limestone......?

Question

Limestone, an underlying material for many soils, dissolves and corrodes when exposed to high concentrations of hydrogen ions. How is this information important in understanding the effects of acid precipitation?

Answer 1

This is most important because limestone acts as a buffer. When the hydrogen ions dissolve the limestone, they become neutralized by limestone's calcium carbonate. So limestone, where it is present, makes the effects of acid precipitation less severe by neutralizing some of the acid.