1.

At `17^(@)C` the osmotic pressure of an aqueous of sucrose is `1.855 atm` per `150 mL` solution. Calculate the weight of sucrose in solution.

Answer» Correct Answer - 4
`pi V = nST = (w)/(m)ST`
`pi = 1.855 atm`., `V = (150)/(1000) = 0.15 litre`, `w = ?`
`T = 17+273 = 290K, m = 342`,
`S = 0.0821 "litre atm" K^(-1) mol^(-1)`
`:. W = (pi Vm)/(ST) = (1.855 xx 0.15)/(0.0821 xx 290) ~~ 4 g`


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