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Ni(OH)₂ ⇌ Ni²⁺ + 2OH⁻. Solubility of Ni(OH)₂ is 2 × 10⁻¹³ M.

1. 2 × 10⁻¹³ M
2. 2 × 10⁻¹² M
3. 2 × 10⁻¹⁴ M
4. 2 × 10⁻¹⁵ M

Correct answer: 2 × 10⁻¹³ M

Solution

The solubility of Ni(OH)₂ is directly given as 2 × 10⁻¹³ M in the question, so no further calculation is needed.

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