1.

pH of a solution of 10 ml. 1 N sodium acetate and 50 ml 2N acetic acid (K_(a) = 1.8 xx 10^(-5)), is approximately

Answer»

4
5
6
7

Solution :`pH = pK_(a) + LOG.(["SALT"])/(["Acid"])`
`pH = - log (1.8 xx 10^(-5)) + log.([10])/([100])`
`= -log 1.8 + 5 + log 10^(-1)`
`= 0.2553 + 5 - 1 = 3.7447` or = 4.


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