Chem 1332
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- Words: 718
- Pages: 4
View Attempt
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
View Attempt 6 of unlimited Title:
Chapter 13
Started:
September 20, 2009 10:58 PM
Submitted:
September 20, 2009 11:22 PM
Time spent:
00:24:15
Total score: 9/12 = 75% 1.
Total score adjusted by 0.0
Maximum possible score: 12
IMF in solution 42 What is the strongest form of intermolecular force between solute and solvent in a solution of CH4(g) in C6H14(l)?
Student Value Response
Correct Answer
Feedback
1. ion-dipole 0% 2. dipoledipole
0%
3. hydrogen 0% bonding 4. dipoleinduced dipole
0%
5. dispersion 100% Score:
2.
1/1
Relative Solubility 43 Which of the following is less soluble in hexane, ethanol or CH3Br(l). Don't try to type the subscripts, just use letters and numbers.
Student Response 1. ethanol Score:
3.
Value
Correct Answer
100%
Equals ethanol (100%)
1/1
Solution Energetics 2 An ionic compound has a very negative heat of solution in water. Would you expect it to be very soluble, slightly soluble or nearly insoluble in water?
Student Response 1. very soluble
1 of 4
Value
Correct Answer
100%
Equals very soluble (100%) Contains very (0%)
20-Sep-09 11:27 PM
View Attempt
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
Score:
4.
1/1
Henry's Law Calculation 1 The partial pressure of CO2 gas about the liquid in a carbonated drink is 4.0. Assuming that the Henry's law constant for CO2 in the drink is that same as that in water, 3.7 x 10-2 mol/L atm, calculate the solubility of carbon dioxide in this drink.
Student Response Answer .148 Score:
5.
Value
Correct Answer
100%
0.148
1/1
Chapter 8 Molality 8 Determine the molality of a solution prepared by dissolving 4.93 g of heptane in 95.1 g of benzene.
Student Response Answer .517 Score:
6.
Value
Correct Answer
100%
0.52
1/1
Chapter 8 MF to molal 6 Determine the molality of a solution of ethanol dissolved in water for which the mole fraction of ethanol is 0.12.
Student Response Answer 2.96 Score:
7.
Value
Correct Answer
0%
7.58
0/1
Ionic Dissociation Calculation 7 How many moles of solute particles are present in 1.32 mL of 0.522 M Na2SO4? Use scientific notation with 3 significant figures!!!!
Student Response Answer 3.07E-3 Score:
2 of 4
Value
Correct Answer
0%
2.07E-3 (2.07 × 10-3)
0/1
20-Sep-09 11:27 PM
View Attempt
8.
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
General Properties Comparison 2 Consider the solutions, 0.06 m urea [(NH2)2C=O)], 0.03 m AgNO3 and 0.02 m CaCl2. Which has (i) the lowest osmotic pressure, (ii) the highest vapor pressure, (iii) the highest boiling point?
Student Value Response
Correct Answer
Feedback
1. (a) 0.06 0% m urea (b) 0.03 m AgNO3 (c) 0.02 m CaCl2 2. (a) 0.06 m urea (b) 0.06 m urea (c) 0.02 m CaCl2
0%
3. (a) 0.06 m urea (b) 0.02 m CaCl2 (c) 0.02 m CaCl2
0%
4. (a) 0.02 m CaCl2 (b) 0.06 m urea (c) 0.06 m urea
0%
5. all will be the same
100%
Score:
9.
0/1
Chapter 8 BP 4 Calculate the boiling point (in degrees C) of a solution made by dissolving 2.09 g of fructose (C6H12O6) in 53.4 g of water. The Kbp of the solvent is 0.512 K/m and the normal boiling point is 373 K.
Student Response Answer 100.55 Score:
3 of 4
Value
Correct Answer
100%
100.111
1/1
20-Sep-09 11:27 PM
View Attempt
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
10. Chapter 8 BP 11 Calculate the boiling point (in degrees C) of a solution made by dissolving 8.39 g of anthracene{C14H10} in 18.7 g of benzene. The Kbp of the solvent is 2.53 K/m and the normal boiling point is 80.1 degrees C.
Student Response Answer 86.5 Score:
Value
Correct Answer
100%
86.48
1/1
11. Chapter 8 MM bp 2 When 8.7 g of an unknown non-electrolyte is dissolved in 50.0 g of benzene, the boiling point increased by 3.558 degrees C. If the Kbp of the solvent is 2.53 K/m, calculate the molar mass of the unknown solute.
Student Response Answer 123.7 Score:
Value
Correct Answer
100%
124
1/1
12. Chapter 8 VP MM 1 When 6.1 g of an unknown, non-volatile, non-electrolyte, X was dissolved in 100. g of benzene, the vapor pressure of the solvent decreased from 100 torr to 93.4 torr at 299 K. Calculate the molar mass of the solute, X.
Student Response Answer 67.43 Score:
Value
Correct Answer
100%
67
1/1
Done
4 of 4
20-Sep-09 11:27 PM
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
View Attempt 6 of unlimited Title:
Chapter 13
Started:
September 20, 2009 10:58 PM
Submitted:
September 20, 2009 11:22 PM
Time spent:
00:24:15
Total score: 9/12 = 75% 1.
Total score adjusted by 0.0
Maximum possible score: 12
IMF in solution 42 What is the strongest form of intermolecular force between solute and solvent in a solution of CH4(g) in C6H14(l)?
Student Value Response
Correct Answer
Feedback
1. ion-dipole 0% 2. dipoledipole
0%
3. hydrogen 0% bonding 4. dipoleinduced dipole
0%
5. dispersion 100% Score:
2.
1/1
Relative Solubility 43 Which of the following is less soluble in hexane, ethanol or CH3Br(l). Don't try to type the subscripts, just use letters and numbers.
Student Response 1. ethanol Score:
3.
Value
Correct Answer
100%
Equals ethanol (100%)
1/1
Solution Energetics 2 An ionic compound has a very negative heat of solution in water. Would you expect it to be very soluble, slightly soluble or nearly insoluble in water?
Student Response 1. very soluble
1 of 4
Value
Correct Answer
100%
Equals very soluble (100%) Contains very (0%)
20-Sep-09 11:27 PM
View Attempt
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
Score:
4.
1/1
Henry's Law Calculation 1 The partial pressure of CO2 gas about the liquid in a carbonated drink is 4.0. Assuming that the Henry's law constant for CO2 in the drink is that same as that in water, 3.7 x 10-2 mol/L atm, calculate the solubility of carbon dioxide in this drink.
Student Response Answer .148 Score:
5.
Value
Correct Answer
100%
0.148
1/1
Chapter 8 Molality 8 Determine the molality of a solution prepared by dissolving 4.93 g of heptane in 95.1 g of benzene.
Student Response Answer .517 Score:
6.
Value
Correct Answer
100%
0.52
1/1
Chapter 8 MF to molal 6 Determine the molality of a solution of ethanol dissolved in water for which the mole fraction of ethanol is 0.12.
Student Response Answer 2.96 Score:
7.
Value
Correct Answer
0%
7.58
0/1
Ionic Dissociation Calculation 7 How many moles of solute particles are present in 1.32 mL of 0.522 M Na2SO4? Use scientific notation with 3 significant figures!!!!
Student Response Answer 3.07E-3 Score:
2 of 4
Value
Correct Answer
0%
2.07E-3 (2.07 × 10-3)
0/1
20-Sep-09 11:27 PM
View Attempt
8.
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
General Properties Comparison 2 Consider the solutions, 0.06 m urea [(NH2)2C=O)], 0.03 m AgNO3 and 0.02 m CaCl2. Which has (i) the lowest osmotic pressure, (ii) the highest vapor pressure, (iii) the highest boiling point?
Student Value Response
Correct Answer
Feedback
1. (a) 0.06 0% m urea (b) 0.03 m AgNO3 (c) 0.02 m CaCl2 2. (a) 0.06 m urea (b) 0.06 m urea (c) 0.02 m CaCl2
0%
3. (a) 0.06 m urea (b) 0.02 m CaCl2 (c) 0.02 m CaCl2
0%
4. (a) 0.02 m CaCl2 (b) 0.06 m urea (c) 0.06 m urea
0%
5. all will be the same
100%
Score:
9.
0/1
Chapter 8 BP 4 Calculate the boiling point (in degrees C) of a solution made by dissolving 2.09 g of fructose (C6H12O6) in 53.4 g of water. The Kbp of the solvent is 0.512 K/m and the normal boiling point is 373 K.
Student Response Answer 100.55 Score:
3 of 4
Value
Correct Answer
100%
100.111
1/1
20-Sep-09 11:27 PM
View Attempt
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
10. Chapter 8 BP 11 Calculate the boiling point (in degrees C) of a solution made by dissolving 8.39 g of anthracene{C14H10} in 18.7 g of benzene. The Kbp of the solvent is 2.53 K/m and the normal boiling point is 80.1 degrees C.
Student Response Answer 86.5 Score:
Value
Correct Answer
100%
86.48
1/1
11. Chapter 8 MM bp 2 When 8.7 g of an unknown non-electrolyte is dissolved in 50.0 g of benzene, the boiling point increased by 3.558 degrees C. If the Kbp of the solvent is 2.53 K/m, calculate the molar mass of the unknown solute.
Student Response Answer 123.7 Score:
Value
Correct Answer
100%
124
1/1
12. Chapter 8 VP MM 1 When 6.1 g of an unknown, non-volatile, non-electrolyte, X was dissolved in 100. g of benzene, the vapor pressure of the solvent decreased from 100 torr to 93.4 torr at 299 K. Calculate the molar mass of the solute, X.
Student Response Answer 67.43 Score:
Value
Correct Answer
100%
67
1/1
Done
4 of 4
20-Sep-09 11:27 PM
