1.

A buffer solution contains 0.1 mole of sodium acetate in 1000 cm^(3) of 0.1 M acetic acid. To the above buffer solutions, 0.1 mole of sodium acetate is further added and dissolved. The pH of the resulting buffer is equal to............

Answer»

`pK_(a) - log_(2)`
`pK_(a)`
`pK_(a) + 2`
`pK_(a) + log 2`

SOLUTION :`PH = pK_(a) + log.(["Salt"])/(["Acid"])`
`["Salt"] = (0.1 + 0.1)/(1000 ml) = (0.2)/(1) = 0.2`
`["Acid"] = (0.1)/(1000 ml) = (0.1)/(1) = 0.1`
`pH = pK_(a) + log 2`
`:. pH = 14 - 2 RARR pH = 12`.


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