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Which of the following statements is true of a solution at pH 7?

A. Kw and Kb are equal.
B. Kw and Ka are equal.
C. Kw, Ka and Kb are equal.
D. Ka and Kb are equal.

2 answers

Kw = Ka x Kb
For pH = 7 => Kw = 10^-14 @ 25-deg Celcius
Therefore, for Ka x Kb = 10^-14 => Ka = Kb = 10^-7
=> (10^-7)(10^-7)= 10^-14

D. Ka and Kb are equal
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