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whats the relation between the degree of ionization and the equilibrium constant for a weak acid or base?

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  • whats the relation between the degree of ionization and the equilibrium constant for a weak acid or base?


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Answer #1 | 08/02 2014 09:09
The degree of ionization of a weak electrolyte is directly related to the magnitude of the equilibrium constant. The smaller the value of Keq, the lower the degree of ionization. Hydrofluoric acid, HF, is a weak acid with a Ka of 6.6×10^-4, while acetic acid, CH3COOH, has a Ka of 1.8x10^-5. HF has a greater degree of ionization than acetic acid. HF <==> H+ + F- Ka = [H+] [F-] / [HF] Ka is directly proportional to [H+]
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Answer #2 | 08/02 2014 09:08
Larger the degree of ionization the greater the equilibrium constant. The equilibrium constant is the ratio of the concentration of the ions produced raised to the power of the coefficients divided by the final concentration of the unionized molecules concentration.
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