During the titration of a monoprotic weak acid with a strong base

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

During the titration of a monoprotic weak acid with a strong base, what is the numerical relationship between the solution’s pH and the acid’s

K_a

at the half-equivalence volume? (a)

\text{pH} = \dfrac{1}{2}\,\text{p}K_a

(b)

\text{pH} = \text{p}K_a

(c)

\text{pH} = 14 - \text{p}K_a

(d)

\text{pH} \approx \text{p}K_a - 0.30