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Question

The pH of 1 M CH3COONa solution in water will be nearly: (pKa for CH3COOH=4.74)

A
12.37
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B
11.37
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C
7.37
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D
9.37
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Solution

The correct option is D 9.37
CH3COONa+H2OCH3COOH+NaOH
Mixture of weak acid and strong base.
pH=7+12(pKa+logC)pH=7+12(4.74+log(1))pH=7+4.742pH=7+2.37pH=9.37

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