Formic acid hfor has a ka value equal to about 18 10-4 a, Ask an Expert

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Formic acid, HFor, has a Ka value equal to about 1.8 * 10^(-4). A student is asked to prepare a buffer having a pH of 3.60 from a 0.10 M HFor and a 0.10M NaFor solution. How many milliliters of the NaFor solution should she add to 20 ml of the 0.10 M HFor to make the buffer?

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