Why does the dashed buffer (lower capacity) change pH faster?
- A
K is smaller for the dashed one
- Bcheck_circle
It contains less HA and A- to absorb added base
- C
It has a different pKa
- D
It is at higher temperature
Explanation
Buffer capacity scales with the absolute amount of weak acid and conjugate base. Lower amounts mean smaller capacity to absorb added strong acid/base, so pH shifts more.