A weak monobasic acid dissociates to $0.001 \%$ in its $0.01 \mathrm{M}$ solution. What is its dissociation…

A weak monobasic acid dissociates to $0.001 \%$ in its $0.01 \mathrm{M}$ solution. What is its dissociation constant?
  1. $1 \times 10^{-6}$
  2. $1 \times 10^{-8}$
  3. $1 \times 10^{-3}$
  4. $1 \times 10^{-12}$

Solution

$\begin{aligned} & \mathrm{K}_{\mathrm{a}}=\propto^2 \mathrm{C} \\ & =\left(\frac{0.001}{100}\right)^2 \times 0.01 \\ & =1 \times 10^{-12}\end{aligned}$

Asked in: MHT CET 2022 (08 Aug Shift 2)

Practice more Ionic Equilibria questions on Aicharya