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Determine the pH of a buffer that is 0.250 M acetic acid and 0.200 M sodium acetate? Ka for acetic acid = 1.8 times 10^-6
Expert Answer
Answer
pH = pKa + log [CH3COONa] / [CH3COOH]
pKa = – log Ka = – log [1.8 x 10-5] = 4.74
pH = 4.74 + log [0.2] / [0.25]
pH = 4.64
