The values of for slightly soluble salts and are each equal to . Which salt is mathematically more s — Ionic Equilibrium Chemistry Question
Question
The values of $K_{sp}$ for slightly soluble salts $MX$ and $QX_2$ are each equal to $4.0 \times 10^{-18}$. Which salt is mathematically more soluble in pure water?
Answer: B
💡 Solution & Explanation
For $MX$: $s^2 = 4 \times 10^{-18} \implies s = 2 \times 10^{-9} \text{ M}$. For $QX_2$: $4s^3 = 4 \times 10^{-18} \implies s^3 = 10^{-18} \implies s = 10^{-6} \text{ M}$. $QX_2$ is more soluble.
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