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MHT CET 202622 AprilMorning Shift
Exam
MHT CET
Year
2026
Date
22 April
Shift
Morning Shift
Subject
Chemistry
Chapter
Ionic Equilibrium

MHT CET 2026 · 22 April · Morning Shift · Chemistry · Ionic Equilibrium

Find the p K_b of the weak base BOH, if its K_b is 1 × 10^ -5 ?

Find the pKb\text{K}_b of the weak base BOH, if its Kb\text{K}_b is 1×10−51 \times 10^{-5} ?

Options

  1. A−5-5
  2. B55
  3. C1010
  4. D10−510^{-5}

Correct answer

B. 55

Step-by-step solution

The relationship between pKb\text{pK}_b and Kb\text{K}_b is given by:

pKb=−log⁡10(Kb)\text{pK}_b = -\log_{10}(\text{K}_b)

Substituting the given value Kb=1×10−5\text{K}_b = 1 \times 10^{-5}:

pKb=−log⁡10(1×10−5)\text{pK}_b = -\log_{10}(1 \times 10^{-5})

pKb=−(−5)\text{pK}_b = -(-5)

pKb=5\text{pK}_b = 5

Answer: 55
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