The ratio of volumes of 0.1(N) `CH_3COOH` to 0.1(N) `CH_3COONa` required to prepare a buffer solution of pH 5.74 is (given : `pK_a` of `CH_3COOH` is 4.74_-

Options

A. `10:1`
B. `5:1`
C. `1:5`
D. `1:10`

Explanation

`pH+pKa+log_(10)("Activity of salt")/("Activity of acid")`
or , `5.74=4.74+log_(10)" "(("Concentration" xx"Volume")_("(salt)"))/("Concentration"xx"Volume")_("(acid)")`
[Concentration given are same]
or, `1=log_(10)(V_("salt"))/(V_("acid")) " or "V_("salt"):V_("acid")=10:1`
`:.V_("acid"):V_("salt")=1:10`