1. Tardigrade
  2. Question
  3. Chemistry
  4. Equimolar solutions of HF, HCOOH and HCN at 298 K have the values of Ka as 6.8 × 10-4, 1.8 × 10-4 and 4.8 × 10-9 respectively. What will be the order of their acidic strength?

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Q. Equimolar solutions of $HF$, $HCOOH$ and $HCN$ at $298\,K$ have the values of $K_a$ as $6.8 \times 10^{-4}$, $1.8 \times 10^{-4}$ and $4.8 \times 10^{-9}$ respectively. What will be the order of their acidic strength?

Equilibrium

Solution:

Acidic strength $\propto \sqrt{K_{a}}$