1.

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

Answer»

`pK_(a)`
`pK_(a)+2`
`pK_(a)-log 2`
`pK_(a)+log2`

SOLUTION :TOTAL MOLES of sodium acetate
`0.1+0.1=0.2`
`pH=pK_(a)+"log"([CH_(3)COONa])/([CH_(3)COOH])`
`pH=pK_(a)+"log"(0.2)/(0.1)=pK_(a)+log2`.


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