The pKa value for
HCN is 9.40. Would a buffer prepared from
NaCN with a pH of 8.90 be considered to be an effective buffer?
A buffer in which the mole ratio of NaCN to
HCN is 0.41 ha as a pH of 9.01. Would this buffer solution have a greater capacity for added acid (H3O^+) or added base (OH^-)?