Buffer solutions

Resolved Question

Which of the following canot function as a buffer solution:

HCN and KCN,
HF and NaF,
HNO3 and NaNO3,...?
HNO2 and NaNO2, or
NH3 and (NH4)2 SO4


by joeyeehu...

Best Answer - Chosen by Voters
In order to function as a buffer, it must have two components:

a) a weak acid and its conjugate base or
b) a weak base and its conjugate acid

HNO3 is a strong acid, therefore HNO3 and NaNO3 cannot function as a buffer.
The rest are buffer solutions.