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Question: Answered & Verified by Expert
A weak monobasic acid dissociates to $0.001 \%$ in its $0.01 \mathrm{M}$ solution. What is its dissociation constant?
ChemistryChemical EquilibriumMHT CETMHT CET 2022 (08 Aug Shift 2)
Options:
  • A $1 \times 10^{-6}$
  • B $1 \times 10^{-8}$
  • C $1 \times 10^{-3}$
  • D $1 \times 10^{-12}$
Solution:
1576 Upvotes Verified Answer
The correct answer is: $1 \times 10^{-12}$
$\begin{aligned} & \mathrm{K}_{\mathrm{a}}=\propto^2 \mathrm{C} \\ & =\left(\frac{0.001}{100}\right)^2 \times 0.01 \\ & =1 \times 10^{-12}\end{aligned}$

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