1.

The pK_(a) ofacetic acid is 4.74 . The concentration of CH_(3)C O O His 0.01 M. The pH ofCH_(3) C O O H is

Answer»

3.37
4.37
4.74
0.474

Solution :For a weak acid, `PH=(1)/(2) [pK_(a)-LOG c]`
`=(1)/(2)[4.74-log 10^(-2)]=(1)/(2)xx6.74=3.37`


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