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What is the pH of a buffer that is composed of 68 mL of 0.10 M CH 3 COOH and 121 mL of 0.10 M

What is the pH of a buffer that is composed of 68 mL of 0.10 M CH₃COOH and 121 mL of 0.10 M CH₃COONa?

K_a(CH₃COOH) = 1.81 x 10^-5

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