1 formic acid hfor ha a ka value equal to about 18 x10-4 a, Ask an Expert

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1. Formic acid, HFor, ha a Ka value equal to about 1.8 x10-4. A student is asked to prepare a buffer having a pH of 3.4 from a solution of formic acid and a solution of sodium formate having the same molarity. How many milliliters of the NaFor solution should she add to 20mL of the HFor solutionto make the buffer?

2. How many mL of 010 M NaOH should the student add to20 mL 0.10 M HFor if she wished to prepare a buffer with a pH of3.4, the same as in Problem 4?

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