AP Chemistry
8.11 pH and Solubility
A student prepares a saturated aqueous solution of \(\text{CaCO}_3\) in a beaker at \(25\ ^\circ\text{C}\) with a small amount of solid remaining at the bottom, as represented by the equilibrium equation below.
\[ \text{CaCO}_3(s) \rightleftharpoons \text{Ca}^{2+}(aq) + \text{CO}_3^{2-}(aq) \]
The student then adds a few drops of \(6.0\text{ M }\text{HCl}(aq)\) to the mixture at constant temperature, without significantly changing the total volume. Which of the following best predicts and explains the effect of adding the acid on the amount of solid \(\text{CaCO}_3\)?
\[ \text{CaCO}_3(s) \rightleftharpoons \text{Ca}^{2+}(aq) + \text{CO}_3^{2-}(aq) \]
The student then adds a few drops of \(6.0\text{ M }\text{HCl}(aq)\) to the mixture at constant temperature, without significantly changing the total volume. Which of the following best predicts and explains the effect of adding the acid on the amount of solid \(\text{CaCO}_3\)?
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