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NCSU CH 201 - RWW05 Colligative Properties

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12/14/2016 RWW05 Colligative Propertieshttp://www.webassign.net/web/Student/AssignmentResponses/last?dep=14314086 1/2Current Score : 105 / 105 Due : Tuesday, September 13 2016 11:59 PM EDT1. 52/52 points | Previous AnswersThe molality of an aqueous solution of a nonelectrolyte is 1.260 m.For pure water at 20 oC:Po = 17.5 torrkf = 1.86 oC/m kb = 0.563 oC/ma) What is the vapor pressure of the solution at 20.0 oC?P = 17.11 torrb) What is the boiling point of the solution to the nearest 0.1 oC?t = 100.7 oCc) What is the freezing point of the solution to the nearest 0.1 oC?t = 2.3 oCd) Assume that the molality and molarity of the solution are equal to estimate the osmotic pressure thatis developed by the solution at 20.0 oC?P = 30.30 atm2. 13/13 points | Previous AnswersA 3.14g sample of an enzyme is used to make a 3.40mL solution. What is the molar mass of theenzyme if the osmotic pressure of the solution at 298K is 0.292 atm? Note that enzymes arenonelectrolytes.Mm77379.7462 g/molRWW05 Colligative Properties (Homework)Paddy SheehanCH 201, section 002, Fall 2016Instructor: Robert WarrenWebAssignThe due date for this assignment is past. Your work can be viewed below, but no changes can be made. Important! Before you view the answer key, decide whether or not you plan to request an extension. Your Instructor may notgrant you an extension if you have viewed the answer key. Automatic extensions are not granted if you have viewed the answer key.View Key12/14/2016 RWW05 Colligative Propertieshttp://www.webassign.net/web/Student/AssignmentResponses/last?dep=14314086 2/23. 13/13 points | Previous AnswersA solution is prepared by dissolving 3.37 g of an unknown nonelectrolyte in 21.00 g of cylcohexane (tf =6.6 oC and kf = 20.0 oC/m). What is the molar mass of the unknown compound if the solution has afreezing point of 6.1 oC?Mm = 252.718 g/mol4. 13/13 points | Previous AnswersWhat is the osmotic pressure developed at 30 oC by an aqueous solution that is 0.214 M in AlCl3?21.29 atm5. 14/14 points | Previous AnswersHX is a weak acid that partially dissociates in water: HX > H1+ + X1. A 0.387m aqueous solution ofHX has a freezing point of 1.11 oC. Express your answers to the following to three significant figures.a) What is the van't Hoff factor for HX in water?i = 1.5421 b) (EXTRA CREDIT) What is the molality of X1 ions in the solution?m = .2097


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