1. Tardigrade
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  3. Chemistry
  4. If pKa=4 and textK texta = textCα text2 , then find van't Hoff factor for a weak HA type acid, when C=0.01 M .

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Q. If $pK_{a}=4$ and $\text{K}_{\text{a}} = \text{Cα}^{\text{2}}$ , then find van't Hoff factor for a weak HA type acid, when $C=0.01 \, M$ .

NTA AbhyasNTA Abhyas 2022

Solution:

$\text{K}_{\text{a}}=\text{Cα}^{2}$
$10^{- 4}=10^{- 2}\times \text{α}^{2}$
$\text{α}=0.1$
$\text{i}=1+\text{α}=1.1$