5. Calculate the pH in a,solution prepared by dissolving 0.050 mol of acetic acid (CH₃COOH) and 0.20 mol of sodium acetate (NaCH3COO) in water and adjusting the volume to 500 mL. The pKa for acetic (CH₃COOH) is 4.75.

[Hint: log(0.25) = -0.602]
(A)4.35,
(B)S.35,
(C)6.35,
(D)7.35,
(E) none of above

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