In a titration of monoprotic acids and bases, there is a large change in pHA. at the point where pH = pKa of the acid. B. when the volume of acid is exactly equal to the volume of base. C. when the concentration of acid is exactly equal to the concentration of base. D. when the number of moles of acid is exactly equal to the number of moles of base. E. at the point where pH = pKb of the

D. when the number of moles of acid is exactly equal to the number of moles of base.

Explanation:

Regarding options A. and E., pKa and pKb would only be taken into consideration if the titrations were of weak acids and bases. However it is possible to have a titration of monoprotic acids and bases with strong acids and bases.

Another way of looking at the answer is identifying which one best describes the equivalence point.

the answer would be b i believe