##### Match the following aqueous solutions with the appropriate letter from the colum

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Match the following aqueous solutions with the appropriate letter from the column on the right.

 1 0.17 m CaBr2 A. Highest boiling point 2 0.14 m FeCl3 B. Second highest boiling point 3 0.12 m AlCl3 C. Third highest boiling point 4 0.49 m Glucose(nonelectrolyte) D. Lowest boiling point
May 28th, 2015

We need to take into account the equation for boiling point elevation:

ΔTb = Kb · bsolute · i

Where: bsolute = molality od the solution

Kb, the ebullioscopic constant, which is dependent on the properties of the solvent.

i. The Vant Hoff  factor i accounts for the number of individual particles (typically ions) formed by a compound in solution

i= 3 For CaBr2

i=4 for FeCl3

i=4 for AlCl3

i=1 Glucose

then we need to find which solution have the highest ΔTb

1) ΔTb = Kb(0.17)x(3)= 0.51Kb

2)ΔTb = Kb(0.14)x(4)= 0.56Kb

3)ΔTb = Kb(0.12)x(4)= 0.48Kb

ΔTb = Kb(0.49)x(1)= 0.49Kb

 1 0.17 m CaBr2 B Third highest boiling point 2 0.14 m FeCl3 A Highest boiling point 3 0.12 m AlCl3 D Lowest boiling point 4 0.49 m Glucose(nonelectrolyte) C Second highest boiling point

May 28th, 2015

Sorry I made a mistake in the second and third---but the letters are good

the order is

1-->B-Second

2-->A highest

3-->D lowest

4-->C third

May 28th, 2015

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May 28th, 2015
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May 28th, 2015
Dec 6th, 2016
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