The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionization constant, Ka of this acid is :

Question

The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionization constant, K_a of this acid is :

3 $\times$ 10^–1

1 $\times$ 10^–3

1 $\times$ 10^–5

1 $\times$ 10^–7

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