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What mass of solid sodium formate (of MW 68.01)must be added to 115 mL of 0.57 mol/L formic acid (HCOOH) to make a buffer solu- tion having a pH of

What mass of solid sodium formate (of MW
68.01)must be added to 115 mL of 0.57 mol/L
formic acid (HCOOH) to make a buffer solu-
tion having a pH of 4.16? Ka = 0.00018 for
HCOOH.

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