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Question: Answered & Verified by Expert
Kb for CH2ClCOO- is 6.4×10-12 . The pH of 0.1 M CH2ClCOONa in water is :
ChemistryIonic EquilibriumJEE Main
Options:
  • A 7.9
  • B 6.9
  • C 1.9
  • D 12.1
Solution:
2753 Upvotes Verified Answer
The correct answer is: 7.9
CH 2 ClCOO - + H 2 O ⇌ CH 2 ClCOOH + OH -
OH −  = ch = C⋅ K H c  =  K H ·c  =  K w  × c K a
= K b × c = 6.4 × 1 0 - 1 2 × 0.1
= 8 × 1 0 - 7
∴   pOH  = 6.1
pH  =  7.9

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