College Chemistry Quiz
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CHEMICAL EQUILIBRIUM
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Consider the equilibrium Mg(OH)2(s)⇌Mg2+(aq)+2OH−(aq)Mg(OH)_2(s) \rightleftharpoons Mg^{2+}(aq) + 2OH^-(aq) with Ksp=5.6×10−12K_{sp} = 5.6 \times 10^{-12}. A student writes the equilibrium expression as Ksp=[Mg2+][OH−]2[Mg(OH)2]K_{sp} = \frac{[Mg^{2+}][OH^-]^2}{[Mg(OH)_2]} and argues that this accounts for the limited solubility of the solid. How should this argument be evaluated?
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