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# Page-4 - l 40 A solution of sodium nitrate NaN03 in water...

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Unformatted text preview: l\ 40. A solution of sodium nitrate, NaN03, in water is 5.181M and its density is 1.2680 g mL-l. Calculate the percent, by weight, of sodium nitrate in the solution. A)7. 939 % am. 21 % 024.47 % D)29. 56 % (334. 73 % 51% Ml N as 53ft; mol (5:3- ' LHD 33 Ned/03H» l; L (3:32” L it saw mag l” " 41, Answer same as pervious question 42. When a solute such as ammonium sulfate is dissolved in a solvent like water, one of the observed effects is @a decrease in the vapor pressure of the solvent. ’ B)an increase in the vapor pressure of the solute. C)an increase in the freezing point of the liquid. D)a decrease in the boiling point of the liquid. Elscattering of light beams by the solute particles in the solution. 43. What is the expected freezing point of a solution that contains 25.0 of fructose, CGHuOs, in 250.0 g of H20? Ki: 1.86 °C m'1. A)-O.10 °c B)+0.1O °c C)-0.186 °c D)+O.186 °c @103 °c 0b m. a le m ””65 .. ma = 2163.: g «C . €56 : o OLSOksl'l'io on W5“ ,0 m 1.0?) L : o 555M 44. What IS the freezing point of an aqueous solution of a nonvolatile solute that has a boiling point of 102. 45 C? Kf= 1. 86 C m and Kb- — 0.51 C m'1 A)—0.67 'c B)—O.99 'c C)—2.45 'c D)-2.99 'c @3994 'c OT€=K¢M leoc:05l:C_ , mo _ m 0 AT :Kbm mitlFbOLl: QT€:%H35C 45. Answer same as pervious question an 3 1‘66““ Meson 46. A solution contains 221 g of glycerol (C3H803) in 600 grams of water. The Kb is 0.51 .C m4. What should the boiling point of the solution be? A)100. 02 'c B)100. 73 .Col C)101.65 'c @10204 'c E)103.62 'c 7,110va l-l %%+M OT} 2 0,55l0C g_‘qqu 0H,“ Q» M 3 8.591503 eTe‘lo :lC Wl. Which property of a solution is not a colligative property? A)solubility of a solute B)freezing point depression C)boiling point elevation @osmotic pressure E)vapor pressure lowering 48’. During osmosis: Alpure solvent passes through a membrane but solutes do not pure solute passes through a membrane but solvent does not C)pure solvent moves in one direction through the membrane while the solution moves through the membrane in the other direction D)pure solvent moves in one direction through the membrane while the solute moves through the membrane in the other direction E)pure solute moves in one direction through the membrane while the solution moves through the membrane in the other direction 49. Which aqueous solution will have the highest boiling point temperature? A)0.100 molal NiBr2(aq) B)0.100 molal MgSO4laq) C)0.150 molal NH4NO_=,(aq) @150 molal NazSO4(aq) E)O.250 molal CH30H(aq), methanol 50. Consider a 0.90 M AI(N03)3 solution. This solution has a nitrate ion concentration of A) 0.30 M. B) 0.90M. C) 0.0 M. o)3.1 M. @2] M. ...
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