Chemistry

Problem

At the equivalence point of a titration, the solution contains

0.020\,\text{M}

of the conjugate acid

BH^+

. The parent base has

K_b = 1.6\times10^{-5}

. Assuming activity coefficients are unity, what is the pH of the solution at 25 °C? a)

4.60

8.55

5.45

6.98