1.

The pH of 1 M solution of a weak monobasic acid (HA) is 2. Then, the van't Hoff factor is

Answer»

`1.01`
`1.02`
`1.10`
`1.20`

Solution :pH = 2 means `p[H^(+)]=10^(-2)M`
`{:(,HA,hArr,H^(+),+, A^(-)),("Initial","C MOL L"^(-1),,0,,0),("After disso.",C-C ALPHA,,Calpha,,Calpha","):}`
`"Total "=1+alpha`
Thus, `[H^(+)]=Calpha, i.e., 10^(-2)=1xxalphaor alpha=10^(-2)`
`=1+alpha=1+0.01 =1.01`


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