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Calculate the molar solubility of calcium hydroxide Ca ( OH )₂ in 0.10 M NaOH solution. The ionic product of calcium hydroxide is 5.5 10⁻⁶ .

Options

  1. A11 10⁻⁶
  2. B1
  3. C5.5 10⁻⁴
  4. D5.5

Correct answer

C. 5.5 10⁻⁴

Step-by-step solution

Given, Ionic product of Ca ( OH )₂=5.5 10⁻⁶ Concentration of NaOH solution =0.10 M Ionic product of Ca ( OH )₂=5.5 10⁻⁶ or, Ca ( OH )₂= [ Ca ²⁺ ]+2 [ OH ⁻ ] Let, solubility =S gathered Ca ²⁺+2 [ OH ⁻ ] S (2 S)^2 gathered Also, K_ sp =4 S^3 where, K_ sp = solubility product Due to common ion effect, Molar solubility of Ca ( OH )₂= 5.5 10⁻⁶ 0.1 0.1 =5.5 10⁻⁴

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