Question: which one of the following is a buffer solution? a) 0.40 M HCN and 0.10 KCN b) 0.20 CH3COOH c) 1.0 M HNO3 and 1.0

which one of the following is a buffer solution?

a) 0.40 M HCN and 0.10 KCN

b) 0.20 CH3COOH

c) 1.0 M HNO3 and 1.0 NaNO3

d) 0.10 M KCNe) 0.50 M HCl and 0.10 NaCl

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