The freezing point of water H₂O is 0.00 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze (ethylene glycol). How many grams of antifreeze, CH₂OHCH₂OH (62.10 g/mol), must be dissolved in 268.0 grams of water to reduce the freezing point by 0.450 °C? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula Kb (°C/m) Kf(°C/m) H₂O 0.512 CH3 CH₂OH 1.22 CHC13 3.67 Benzene C6H6 2.53 Diethyl ether CH3 CH₂ OCH2 CH3 2.02 Mass= Water Ethanol Chloroform g 1.86 1.99 5.12
The freezing point of water H₂O is 0.00 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze (ethylene glycol). How many grams of antifreeze, CH₂OHCH₂OH (62.10 g/mol), must be dissolved in 268.0 grams of water to reduce the freezing point by 0.450 °C? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula Kb (°C/m) Kf(°C/m) H₂O 0.512 CH3 CH₂OH 1.22 CHC13 3.67 Benzene C6H6 2.53 Diethyl ether CH3 CH₂ OCH2 CH3 2.02 Mass= Water Ethanol Chloroform g 1.86 1.99 5.12
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:The freezing point of water H₂O is 0.00 °C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in water is antifreeze
(ethylene glycol).
How many grams of antifreeze, CH₂ OHCH₂OH (62.10 g/mol), must be dissolved in 268.0 grams of water to reduce the freezing
point by 0.450 °C? Refer to the table for the necessary boiling or freezing point constant.
Solvent
Formula
Kb(°C/m)
Kf(°C/m)
Water
H₂O
0.512
Ethanol
CH3 CH₂ OH
1.22
Chloroform
CHCl3
3.67
Benzene
C6H6
2.53
Diethyl ether CH3 CH₂ OCH2 CH3 2.02
Mass=
g
1.86
1.99
5.12
Expert Solution
Step 1: Colligative properties
Answer:
When a non-volatile is dissolved in solvent it affects its physical and chemical properties and these properties depend on the number of solute particles dissolved in solvent. Such properties are called as colligative properties. Lowering of vapor pressure, elevation in boiling point, depression in freezing point are the examples of colligative properties.
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