Question: Which weak acid would be best to use when preparing a buffer solution with a pH of 8.10 ? an acid with pa=2.90 an acid

Which weak acid would be best to use when preparing a buffer solution with a pH of 8.10 ?

an acid with pa=2.90

an acid with pa=4.00

an acid with pa=4.80

an acid with pa=5.90

an acid with pa=8.08

an acid with pa=9.30

Which pair of compounds will form a buffer in aqueous solution?

NaCN and KCN

HCN and HCl

HCN and NaCN

NaCN and NaOH

HCl and NaCl

HCl and NaOH

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