SP. 8 Calculate the boiling point of a solution that contains 45.5 g of glycerol CH(OH), a non-volatile, non- dissociating solute in 200 g of water (H₂O).
SP. 8 Calculate the boiling point of a solution that contains 45.5 g of glycerol CH(OH), a non-volatile, non- dissociating solute in 200 g of water (H₂O).
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:2A. Boiling Point Elevation
Boiling point elevation occurs when the boiling point of a solution becomes higher than the boiling
point of a pure solvent. The temperature at which the solvent boils is increased by adding any non-volatile
solute. The amount of boiling point elevation can be calculated using the Clausius-Clapeyron
equation and Raoult's law. For an ideal dilute solution:
Boiling Point total (Tb) = Boiling Pointsolvent (Tbsolv) + AT
AT, = K₂m
where:
AT, = boiling point elevation
Kb = boiling point elevation constant
m = molality of solute
constants for some common solvents:
Solvent
Water
Benzene
Chloroform
Normal Boiling Point, °C
100°C
80.1°C
61.3°C
Bp elevation
const., °C/mol
0.51 °C/mol
2.53 °C/mol
3.63 °C/mol
Transcribed Image Text:SP. 8
Calculate the boiling point of a solution that contains 45.5 g of glycerol CH(OH)3, a non-volatile, non-
dissociating solute in 200 g of water (H₂O).
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