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How does the pH of acid change when a carbonate is added?

1 Answer

Dec 26, 2016

Carbonates will (partly) neutralize the acid, so $p H$ $pH$ goes up.

Explanation:

This is due to the reaction:

$2 H_{3} O^{+} (a q) + C O_{3}^{2 -} (a q) \to 3 H_{2} O (l) + C O_{2} (g)$ $2H_3O^+(aq) +CO_3^(2-)(aq) ->3H_2O(l)+CO_2(g)$

or: $2 H^{+} (a q) + C O_{3}^{2 -} (a q) \to H_{2} O (l) + C O_{2} (g)$ $2H^+(aq) +CO_3^(2-)(aq) ->H_2O(l)+CO_2(g)$

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