---
title: "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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url: "https://nerd-notes.com/ubq/119694/"
date_modified: "2026-08-21T08:12:04+00:00"
---

# 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 \(\text{CaSO}_4\)?

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 \(\text{CaSO}_4\)?

- **A.** \(\text{CaCl}_2(s)\)
- **B.** \(\text{MgCl}_2(s)\)
- **C.** \(\text{NaNO}_3(s)\)
- **D.** \(\text{KCl}(s)\)

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119694/*