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AP Chemistry
7.12 Common-Ion Effect
BeginnerMCQConceptual17.4k
A saturated solution of calcium sulfate is in dynamic equilibrium with undissolved solute at \(25\ ^\circ\text{C}\), as represented by the equation below.

\[\text{CaSO}_4(s) \rightleftharpoons \text{Ca}^{2+}(aq) + \text{SO}_4^{2-}(aq)\]

Which of the following solid substances, when added to the mixture at \(25\ ^\circ\text{C}\) without changing the solution volume, will decrease the molar solubility of \(\text{CaSO}_4\)?

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