Buffer Solutions

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Which of the following combinations cannot produce a buffer solution? Identify proton donor and proton acceptors.

a. HNO2 and NaNO2

b. HCN and NaCN

c. HClO4 and NaClO4

d. NH3 and (NH4)2SO4

e. NH3 and NH4Br



HClO4 and NaClO4 because HClO4 is a strong acid (buffers require the use of a weak acid in mixture with its conjugate base).