q113 and 114 113.* The vapour pressure of a solvent decreased by 10mm of mercury when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent ,if the decrease in the vapour pressure is to be 20 mm of mercury? (1)0.8 (2) 0.6 (3)0.4 (4)0.2 114.* An aqueous solution of sucrose, C12H22O11 containing 34.2g/L has an osmotic pressure 2.38 atmospheres at 17 ° C . For an aqueous solution of glucose C6H1206 ,to be isotonic With this solution,it would have: (1)34.2 g/L (2)17.1 g/L (3) 18.0 g/L (4) 36.0 g/L of glucose Share with your friends Share 0 Vartika Jain answered this Dear Student, Solution of sucrose is isotonic with solution of glucoseThus, Osmotic pressure of sucrose=Osmotic pressure of glucoseand, Osmotic pressure (π)=CRT=nVRTSo,nSVSRT=nGVGRTor, nSVS=nGVGand, VS=VG = 1LSo, nS=nGor, wSMS=wGMGor, 34.2342=xMGor, x=18 gHence, correct answer is (3)Kindly ask the remaining query in the next thread. 1 View Full Answer
