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You are asked to prepare 1.0 L of a HCN/NaCN buffer that has a pH of...

You are asked to prepare 1.0 L of a HCN/NaCN buffer that has a pH of 9.86 and an osmotic pressure of 1.97 atm at 298 K. What masses of HCN and NaCN should you use to prepare the buffer? (Assume complete dissociation of NaCN.)

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