How many grams of KCN (Mm = 65.1 g/mol) must be added to 900. mL of...

Question

Question

How many grams of KCN (M_m = 65.1 g/mol) must be added to 900. mL of 1.240-M solution of HCN in order to prepare a pH = 8.86 buffer?

Answer 1

Answer #1

Concentration of HCN, [HCM] = 1.240 MM PK, of HCN = -log K = -log(7.2x10-10) = 9.14 pH of the buffer= 8.86 According to Hende

Answer 2

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