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Because calcium carbonate is a base, depending on the pH of the base, it will either increase or decrease the pH of the calcium carbonate very slightly.It will probably have â¦ little to no noticeable effects. 3 people found this useful. Graham Howarth.t is found naturally in limestone and  in seashells.   â¦    vCalcium carbonate reacts with acids, releasing carbon  dioxide:   v    vCalcium carbonate will react with water that is saturated with  carbon dioxide to form the soluble calcium bicarbonate.
Acids in acid rain promote the dissolution of calcium carbonate by reacting with the carbonate anion. This produces a solution of bicarbonate. Because surface waters are in equilibrium with atmospheric carbon dioxide there is a constant concentration of carbonic acid, H 2 CO 3, in the water.hen water is in equilibrium with both CO 2 form the atmosphere and carbonate containing rock, the pH of the water is buffered to a pH of 8.3, close to the pKa of the weak acid bicarbonate HCO 3 - (pKa = 8.4). The buffered water resists changes to pH from additional acid or base.