1.

The solubility product of BaSO_(4) at 25^(@)C is 1.0 xx 10^(-9). What would be the concentration of H_(2)SO_(4) necessary to precipitate BaSO_(4) from a solution of 0.01 M Ba^(2) ions

Answer»

`10^(-9)`
`10^(-8)`
`10^(-7)`
`10^(-6)`

Solution :`BaSO_(4) hArr underset(underset(0.01)((S)))(Ba^(++)) + underset((S))(SO_(4)^(--))`
`K_(SP) = S^(2) = S xx S = 0.01 xx S`
`S_((SO_(4)^(2-))) = (K_(sp))/(S_((Ba^(++)))) = (1 xx 10^(-9))/(0.01) = 10^(-7)` mole/litre.


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