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Calculate the pH of a solution made by adding 59 g of sodium acetate, NaCH3COO, to 22 g of acetic acid, CH COOH, and dissolvi
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Answer #1

mixture of acitic acid and sodium acetate act as acidic buffer

for such buffer

pH = pKa + log [sodium acetate] / [acetic acid]

[sodium acetate] = (59 / 82.03) (1000 / 500) = 1.44 M

[acetic acid] = (22 / 60.05) (1000 / 500) = 0.733 M

pKa of CH3COOH = 4.74

pH = 4.74 + log [1.44] / [0.733]

pH = 5.03

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