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The pH of a solution at `25^(@)C` containing 0.10 m sodium acetate and 0.03 m acetic acid is (`pK_(a)` for `CH_(3)COOH = 4.57`)

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The pH of a solution at `25^(@)C` containing 0.10 m sodium acetate and 0.03 m acetic acid is (`pK_(a)` for `CH_(3)COOH = 4.57`)
A. 4.09
B. 5.09
C. 6.1
D. 7.09
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Correct Answer - B
`pH = pK_(a) + log.(["salt"])/(["acid"]) = 4.57 xx + log.(0.10)/(0.03) = 5.09`.
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