1.

The pH of a buffer solution containing 0.2 mole per litre CH_(3)COONa and 1.5 mole per litre CH_(3)COOH is (K_(a) for acetic acid is 1.8 xx 10^(-5))

Answer»

4.87
5.8
2.4
9.2

Solution :`pH = -log K_(a) + log.(["Salt"])/(["ACID"])`
`= log [1.8 xx 10^(-5)] + log.(0.2)/(1.5) = 4.87`.


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