NEET Chemistry Chemical Equilibrium MCQ Question
What is the ionization constant (K_a) of a weak acid HX defined as?
cα² / (1 - α)
c²α / (1 + α)
c(1 - α)² / α
c²(1 - α) / α²
Correct Answer
Detailed Explanation
The ionization constant (K_a) of a weak acid HX is given by the formula K_a = cα² / (1 - α), where c is the initial concentration and α is the extent of ionization. This is derived from the acid dissociation equilibrium in the context of weak acids.
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