Question

Е. попе E. 0.733 and 1.324 14. the molar mass of toluene is 92.6 gmol, how much tokuene is needed to depress the freezing point of 200 g of benzene by 047C? K 5.12 Cm a The vapor pressure of pure water at 26 "C is 25.2 torr. What is he vapor pressure of a solution that contains 16.0 g of glucose (CaHuO) dissolved in 80 g of water? A. 1.7g A. 14.1 tor B. 17g B. 24.7 torm C. 00.91g C. 23.1 tor D. 18.35g D. 25.7 tor E. Not enough information given to answer E. 16.8 tor 15. For crystal lattice where dimension, a b angles a Bay 90, it represents c and also all 10. Calculate the approximate freezing point of a solution prepared by dissolving 51.2g of naphthalene (CieHa) in 300 g of cyclohexane. Pure cyclohexane freezes at 6.66 "C. Kof cyclohexane 20.0 "Cm A. tetragonal B aubic C. tetragonal D. orthorhombic A. 20 "C E. both A and C B. -20 "C 16. Consider the compounds water (HO), dimethylether (CHOCH), ethanol (CHCH:OH), and propane (CH CH:CH). Their boiling points, not necessarily in order, are -42.1 °C. -24.8 "C, 78.4 C and 100 c. Which one is INCORRECT prediction: C. 33.33 C D. 6.36 C E. None of the above. A water [100 C] law, the solubility of a gas in solvent at compared to higher pressure. C B. ethanol (78.4 "c 11. According to lower pressure will be C C. propane -24.7"C C D. dimethylether 1-24.7 C A. Henry's and lower B. Henry's and higher E. propane -42.1 C C. Raoult's and lower 17. If the solute concentration outside the cell is less than that inside the cel, the solution is D. Raoult's and higher E. Both C and D B. hypertonic A, isotonic 12. The mole fraction of solute in a 3.0 m solution of sodium chloride [NaCl in water will be: C. hypotonic D. both B and C 18. The red blood cells (RBCs] will result in hemolysis, if we place the cells in A. 0.05 solution. B. 0.95 B. hypertonic A isotonic C. 0.003 D. both B and C C. hypotonic D. 3.333 19: Which of the following is not a colloidal system? E. None of the above B. cream foam A. aerosol spray 13. What is the freezing point of a solution that contains 24.0 g of glucose (CeH12O) in 50 g of acetic acid (CH3COOH). K 3.90°C/m, mp 16.6 "C D. pure water C. Moating soap 20. Highest limiting value of vant Hoff factor is among following A. 6.2 C B. NaC A Urea D. KSO B. 10.4 C C.MgSO C. 16.2 °C

Answer 1

Reoults law Statas that, Psol P salvent - Xjalent Psot of Solu tron Vapor pre ssure Mole fraction of Solvent Xsolatien of pure Poshvent Solvent Vapor pre Ssuve Mole fraction is defined as the mumber of moles of to tal numbeY a Compon ent ofa of moles Solution divided by Solution the present in that rao ot glucale Molar mass ot slucofe Mass io Number of moles of glutose =0.088 maley 180 Ma ss io Number of moles of water Motar ma SS 4 44 moley Total number of moles 4.52 moley

Mole fraction 6f natir a Na mber of mdes of waliv Total number of meley 4.4f moles 4.528 moles 898 Vapor pre ssu ve et Solutron, -. P pater water Psat 17 tor 0.98 X 25. 2 24.69 torr