An aqueous solution is prepared by dissolving 0.1 mole in sufficient water to get 100 ml solution at 25°C. For , Ka1 = 4.0 * 10^-6 and Ka2 = 5.0 * 10^-11. The only incorrect equilibrium concentration

Question

An aqueous solution is prepared by dissolving 0.1 mole $H_2CO_3$ in sufficient water to get 100 ml solution at 25°C. For $H_2CO_3$, Ka1 = 4.0 * 10^-6 and Ka2 = 5.0 * 10^-11. The only incorrect equilibrium concentration is

Prashant Kotian · Accepted Answer

Correct answer: A. C = 1.0 M. [H+] = √(Ka1*C) = √(4*10^-6) = 2.0*10^-3 M (not 6.32*10^-4). Statement (a) is incorrect.

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