What is the hydroxide-ion concentration of a saturated solution of Ni(OH)₂? For Ni(OH)₂,K_sp = 2.0 × 10^-15. A)2.8 × 10^-3 M B)7.9 × 10^-6 M C)1.0 × 10^-7 M D)2.7 × 10^-2 M E)1.6 × 10^-5 M

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Quizplus · Accepted Answer

For Ni(OH)₂, Ksp = [Ni²⁺][OH⁻]². Let [Ni²⁺] = s and [OH⁻] = 2s. Ksp = s(2s)² = 4s³. Solving 4s³ = 2.0 × 10⁻¹⁵ gives s = 6.3 × 10⁻⁶ M, so [OH⁻] = 2s = 1.6 × 10⁻⁵ M.

What Is the Hydroxide-Ion Concentration of a Saturated Solution of Ni(OH)2

What Is the Hydroxide-Ion Concentration of a Saturated Solution of Ni(OH)₂