Sharpest pH change Which one of the titrations will have the sharpest pH change at equivalence point?

a) weak acid and weak base
b) weak acid and strong base
c) strong acid and weak base
d) strong acid and strong base

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

beta decay is the answer