Chemistry - Ionic Equilibrium Question with Solution | TestHub

ChemistryIonic EquilibriumGeneral (Ostwald's Dilution Law, Degree of Ionisation)Medium2 minPYQ_2025

ChemistryMediumsingle choice

A weak acid HA has degree of dissociation x . Which option gives the correct expression of ( pH $pK_{a}$ )?

Options:

Answer:

Solution:

$K_{a} = \frac{[ H ^{+} ] ( x )}{C ( 1 - x )} [H^{+}] = K_{a} \frac{( 1 - x )}{x} lo g H^{+} = lo g K_{a} + lo g (\frac{1 - x}{x}) - lo g H^{+} = - lo g K_{a} - lo g \frac{1 - x}{x} pH = pK_{a} - lo g \frac{1 - x}{x} pH - pK_{a} = lo g \frac{x}{1 - x}$

Stream:JEESubject:ChemistryTopic:Ionic EquilibriumSubtopic:General (Ostwald's Dilution Law, Degree of Ionisation)

⏱ 2mℹ️ Source: PYQ_2025

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