1.

Determine the osmotic pressure of a solution prepared by dissolving 2.5xx10^(-2)"g of "K_(2)SO_(4) in 2 L of water at 25^(@)C, assuming that it is completely dissociated. ("R = 0.0821 L atm K"^(-1)"mol"^(-1)," Molar mass of "K_(2)SO_(4)="174 g mol"^(-1))

Answer»


Solution :`K_(2)SO_(4)rarr2K^(+)+SO_(4)^(2-) thereforei=3,""C=(2.5xx10^(-2))/(174)xx(1)/(2)=7.18xx10^(-5)"mol L"^(-1)`
`pi="i CRT,"pi=(3)(7.18xx10^(-5)" mol L"^(-1))("0.0821 L atm K"^(-1)"mol"^(-1))(298K)=5.27xx10^(-3)"atm"`


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