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Question

Calculate pH of saturated solution of Mg(OH)2,Ksp for Mg(OH)2 is 32.0×1012.
Given :log2=0.3010
  1. 9.4
  2. 10.4
  3. 9.8
  4. 11.2


Solution

The correct option is B 10.4
Mg(OH)2Mg2+s+2OH2s4s3=32.0×1012s=2.0×104 m[OH]=2×2×104pOH=3.39pH=10.41

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