Chemistry - Ionic Equilibrium Question with Solution | TestHub

ChemistryIonic EquilibriumMiscellaneous/MixedEasy2 minPYQ_2020

ChemistryEasysingle choice

Calculate dissociation constant for an acid $HA$ having $[H^{+}]$ equals to $0 .1 M$ (Given: degree of dissociation of $HA$ is $1%$ )

Answer:

Solution:

$k_{a} = \frac{α^{2} C}{1 - α}$ , $α$ is very small ;
$∴ 1 - α \approx 1$
$Cα = 0 .1$
$k_{a} = (Cα)α$
$= 0.01 \times 0.1 = 10^{- 3}$

Stream:NTA_ABHYASSubject:ChemistryTopic:Ionic EquilibriumSubtopic:Miscellaneous/Mixed

⏱ 2mℹ️ Source: PYQ_2020

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