A solution of sucrose (Molar mass =342g/mol) is prepared by dissolving 68.4g of it per litre of solution, what is osmotic pressure (R=0.082LatomK−1mol−1) at 273K?
A
3.92atm
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B
4.48atm
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C
5.92atm
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D
29.4atm
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Solution
The correct option is A4.48atm Osmotic pressure (π)=CRT Here, C= concentration of solution C=nV ∴n=wm=weight in gram of substanceMol. weight of substance V=1litre C=68.4342 π=68.4342×0.082×273 =4.48atm