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Calculate the pH of a buffer solution prepared by dissolving 0.12 mole of cyanic acid, HCNO and 0.65 mole of sodium cyanate, NaCNO in enough water to make 1.0 liter of solution. [Ka(HCNO) = 2.0 × 10-4]

I know that this question has something to do with turning moles into molarity or something, but I am at a loss on how to do it.

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2.78

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