A buffer contains 0.02 M acetic acid and 0.2 M sodium acetate. If p\(K_a\) of acetic acid is 4.74, the pH of the buffer is
A. 3.74
B. 5.74
C. 6.74
D. 4.74
1 answer
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Answer: B. 5.74
pH \(=pK_a+\log\frac{[\text{salt}]}{[\text{acid}]}=4.74+\log10=5.74\).
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· 23 Oct 2026
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