Problem: What is the pH of a buffer that is 0.120 M in formic acid (HCHO2) and 0.080 M in potassium formate (KCHO2)? For formic acid, Ka = 1.8 x 10–4.

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pH = pKa + log(conjugate baseweak acid)pH = -log Ka + log(conjugate baseweak acid)

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What is the pH of a buffer that is 0.120 M in formic acid (HCHO2) and 0.080 M in potassium formate (KCHO2)? For formic acid, Ka = 1.8 x 10–4.

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