B) If the temperature at point (a) on the above graph is 0.1 °C, and the temperature atpoint (b) is -3.5 °C, what is the ATr of the solution?C) 1.25 grams of an unknown compound is dissolved into 85.0 grams of benzene, anorganic solvent with a freezing point depression constant, Kf = 5.12 °C/m. The freezingpoint of the pure benzene is 5.51°C and the freezing point of the solution is 4.50 °C.Find the molar mass (molecular weight) of the unknown compound. 2. Determination of Molar Mass by Freezing Point Depressionbe able to interpret a cooling curve, calculate molar mass and use i factors infreezing point depression calculationsTemperature vs. Cooling Time for Solvent and Solution7(0)(a)BATPPura SultTime of Cong1000SectingSolutionf)Freezing point ofpure solverezing pistetsolutionFigure 1. Freezing Point Graph for Pure Solvent and for SolutionA) If the two cooling curves shown above had not been labelled to indicate which one isthe pure solvent, and which one is the solution, would you be able to distinguishthem? If so, explain how you would know which one is which.1

Answered: Image /qna-images/answer/89e279ef-f711-45e4-88ae-656002ea8bf2.jpg

B) If the temperature at point (a) on the above graph is 0.1 °C, and the temperature at point (b) is -3.5 °C, what is the ATr of the solution? C) 1.25 grams of an unknown compound is dissolved into 85.0 grams of benzene, an organic solvent with a freezing point depression constant, Kr= 5.12 °C/m. The freezing point of the pure benzene is 5.51°C and the freezing point of the solution is 4.50 °C. Find the molar mass (molecular weight) of the unknown compound.

B) If the temperature at point (a) on the above graph is 0.1 °C, and the temperature at point (b) is -3.5 °C, what is the ATr of the solution? C) 1.25 grams of an unknown compound is dissolved into 85.0 grams of benzene, an organic solvent with a freezing point depression constant, Kr= 5.12 °C/m. The freezing point of the pure benzene is 5.51°C and the freezing point of the solution is 4.50 °C. Find the molar mass (molecular weight) of the unknown compound.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section: Chapter Questions

Problem 70QRT

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