he boiling point of diethyl ether, CH3CH2OCH2CH3, is 34.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is chlorophyll. A student dissolves 13.24 grams of chlorophyll, C55H72MgN4O5 (893.5 g/mol), in 268.4 grams of diethyl ether. Use the table of boiling and freezing point constants to answer the questions below. The molality of the solution is______ m. The boiling point of the solution is_______ Celsius.

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter12: Solutions
Section: Chapter Questions
Problem 12.19QE
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The boiling point of diethyl etherCH3CH2OCH2CH3, is 34.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is chlorophyll.

A student dissolves 13.24 grams of chlorophyllC55H72MgN4O5 (893.5 g/mol), in 268.4 grams of diethyl ether. Use the table of boiling and freezing point constants to answer the questions below.

The molality of the solution is______ m.

The boiling point of the solution is_______ Celsius.

Solvent
Formula
K, CC/m) Ke (°C/m)
Water
H20
0.512
1.86
Ethanol
CH;CH,OH
1.22
1.99
Chloroform
CHC13
3.67
Benzene
2.53
5.12
Diethyl ether CH3CH,OCH,CH3 2.02
The molality of the solution is
m.
Transcribed Image Text:Solvent Formula K, CC/m) Ke (°C/m) Water H20 0.512 1.86 Ethanol CH;CH,OH 1.22 1.99 Chloroform CHC13 3.67 Benzene 2.53 5.12 Diethyl ether CH3CH,OCH,CH3 2.02 The molality of the solution is m.
Expert Solution
Step 1

Given : boiling point of pure solvent i.e diethyl ether = 34.50 oC

Mass of solute i.e chlorophyll = 13.24 g

Molar mass of chlorophyll = 893.5 g/mol.

And mass of solvent i.e diethyl ether = 268.4 g = 0.2684 Kg                                     (since 1 Kg = 1000 g)

 

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