“A saturated solution of a sparingly soluble salt MA, which gives $\text{M}^{2+}$ and $\text{A}^{2-}$, is the left half of a cell with two M electrodes. The right half holds $\text{M}^{2+}$ at $0.025\ \text{mol/L}$. The emf is $0.0769\ \text{V}$ at $298\ \text{K}$. What is $K_{sp}$ of MA?” is available to Standard subscribers.