Calculate the solubility (in M) of cobalt(II) hydroxide, Co(OH)2(s), in H2O. Ksp = 2.90×10^-16 at a specific temperature. 2) What is the pH of this solution of cobalt(II) hydroxide?
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Step 1
90 × 10⁻¹⁶ 3) Let x be the solubility of Co(OH)₂ in moles per liter (M). Then, the concentration of Co²⁺ is x, and the concentration of OH⁻ is 2x. Substitute these values into the solubility expression: 2.90 × 10⁻¹⁶ = (x)(2x)² 4) Solve for x: 2.90 × 10⁻¹⁶ = Show more…
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