Chemical Solutions and Behaviors Questionnaire

The vapor pressure of ethanol is 54.68 mm Hg at 25°C.How many grams of estrogen (estradiol), C18H2402, a nonvolatile, nonelectrolyte (MW = 272.4 g/mol), must be added to 162.4 grams of ethanol to
reduce the vapor pressure to 53.58 mm Hg ?
ethanol = CH3CH2OH = 46.07 g/mol.
g estrogen
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The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is DDT.
Calculate the vapor pressure of the solution at 25 °C when 9.844 grams of DDT, C14H,C15 (354.5 g/mol), are dissolved in 260.6 grams of diethyl ether.
diethyl ether = CH3CH2OCH2CH3 = 74.12 g/mol.
VP(solution)
mm Hg
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The vapor pressure of ethanol is 54.68 mm Hg at 25°C.
How many grams of estrogen (estradiol), C18H2402, a nonvolatile, nonelectrolyte (MW = 272.4 g/mol), must be added to 162.4 grams of ethanol to
reduce the vapor pressure to 53.58 mm Hg ?
ethanol = CH3CH2OH = 46.07 g/mol.
g estrogen
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The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is DDT.
Calculate the vapor pressure of the solution at 25 °C when 9.844 grams of DDT, C14H,C15 (354.5 g/mol), are dissolved in 260.6 grams of diethyl ether.
diethyl ether = CH3CH2OCH2CH3 = 74.12 g/mol.
VP(solution)
mm Hg
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The freezing point of benzene CoHis 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is DDT.
If 12.42 grams of DDT, C14H,C15 (354.5 g/mol), are dissolved in 260.6 grams of benzene …
The molality of the solution is
m.
The freezing point of the solution is
°C.
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The boiling point of ethanol, CH3CH2OH, is 78.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in ethanol is estrogen (estradiol).
A student dissolves 12.45 grams of estrogen, C18H2402 (272.4 g/mol), in 162.4 grams of ethanol. Use the table of boiling and freezing point constants
to answer the questions below.
Ku (°C/m) Kf(°C/m)
0.512
1.86
1.22
1.99
Solvent Formula
Water
H2O
Ethanol CH3CH2OH
Chloroform CHCI:
Benzene
С6Н6
Diethyl ether CH3CH2OCH2CH3
3.67
2.53
5.12
2.02
The molality of the solution is
m.
The boiling point of the solution is
°C.
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The freezing point of water is 0.00°C at 1 atmosphere.
If 12.42 grams of potassium bromide, (119.0 g/mol), are dissolved in 260.6 grams of water …
The molality of the solution is
m.
The freezing point of the solution is
°C.
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The boiling point of water is 100.00 °C at 1 atmosphere.
A student dissolves 12.45 grams of iron(II) iodide, Fel2 (309.7 g/mol), in 162.4 grams of water. Use the table of boiling and freezing point constants to
answer the questions below.
Ký (°C/m) Kf(°C/m)
0.512
1.86
1.22
1.99
Solvent Formula
Water
H2O
Ethanol CH3CH2OH
Chloroform CHCl3
Benzene
C6H6
Diethyl ether CH3CH2OCH2CH3
3.67
2.53
5.12
2.02
The molality of the solution is
m.
The boiling point of the solution is
°C.
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The boiling point of diethyl ether, CH3CH2OCH2CH3, is 34.500 °C at 1 atmosphere. Kõ(diethyl ether) = 2.02 °C/m
In a laboratory experiment, students synthesized a new compound and found that when 12.42 grams of the compound were dissolved in 273.7 grams of
diethyl ether, the solution began to boil at 34.759 °C. The compound was also found to be nonvolatile and a non-electrolyte.
What is the molecular weight they determined for this compound ?
g/mol
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The boiling point of ethanol, CH3CH2OH, is 78.500 °C at 1 atmosphere. Kb(ethanol) = 1.22 °C/m
In a laboratory experiment, students synthesized a new compound and found that when 12.45 grams of the compound were dissolved in 208.2 grams of
ethanol, the solution began to boil at 78.768 °C. The compound was also found to be nonvolatile and a non-electrolyte.
What is the molecular weight they determined for this compound ?
g/mol
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Match the following aqueous solutions with the appropriate letter from the column on the right.
A. Lowest freezing point
B. Second lowest freezing point
1. 0.12 m Ba(CH3COO)2
2. 0.11 m Cr(NO3)2
3. 0.13 m Ca(NO3)2
4. 0.30 m Glucose(nonelectrolyte)
C. Third lowest freezing point
D. Highest freezing point
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Match the following aqueous solutions with the appropriate letter from the column on the right.
1. 0.13 m (NH4)3PO4
2. 0.18 m FeCl2
3. 0.12 m K3PO4
4. 0.46 m Sucrose(nonelectrolyte)
A. Lowest freezing point
B. Second lowest freezing point
C. Third lowest freezing point
D. Highest freezing point
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