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किसी 100 मिली विलयन में 2 ग्राम एसिटेट अम्ल तथा 3 ग्राम सोडियम एसिटेट उपस्थ्ति हैं। विलयन की pH ज्ञात कीजिये। `(K_(a) = 1.8 xx 10^(-5))`

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दिया हुआ विलयन अम्लीय बफर विलयन हैं, अतः
`pH=-logK_(a) + log((लवण)/(अम्ल))`
`[लवण]=(3 xx 1000)/(82 xx 100) मोल/लीटर, [अम्ल ]=(2 xx 1000)/(60 xx 100)` मोल/लीटर
`therefore pH=-log 1.8 xx 10^(-5) + log ((3 xx 1000)/(82 xx 100))/((2 xx 1000)/(60 xx 100))=4.7851`

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