Chem 1332
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- Words: 714
- Pages: 4
View Attempt
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
View Attempt 5 of unlimited Title:
Chapter 13
Started:
September 20, 2009 10:10 PM
Submitted:
September 20, 2009 10:46 PM
Time spent:
00:36:51
Total score: 10/12 = 83.33% 1.
Total score adjusted by 0.0
Maximum possible score: 12
IMF in solution 12 What is the strongest form of intermolecular force between solute and solvent in a solution of NaBr(s) in CH3OH(l)?
Student Value Response
Correct Answer
Feedback
1. ion-dipole 100% 2. dipoledipole
0%
3. hydrogen 0% bonding 4. dipoleinduced dipole
0%
5. dispersion 0% Score:
2.
0/1
Relative Solubility 10 Which of the following is more soluble in water, ethanol or CaCO3(s). 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 4 An ionic compound has a slightly 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 10:48 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 2.7. 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 .0999 Score:
5.
Value
Correct Answer
100%
0.100
1/1
Chapter 8 Molality 1 Determine the molality of a solution prepared by dissolving 4.36 g of sodium chloride in 96.4 g of water.
Student Response Answer .77 Score:
6.
Value
Correct Answer
100%
0.77
1/1
Chapter 8 PC to molal 3 A 1.63 mass % aqueous solution of nitric acid (HNO3) has a density of 1.06 g/mL. Calculate the molality of the solution.
Student Response Answer .920 Score:
7.
Value
Correct Answer
0%
0.26
0/1
Ionic Dissociation Calculation 1 How many moles of solute particles are present in 8.51 mL of 0.786 M K2SO4? Use scientific notation with 3 significant figures!!!!!
Student Response Answer 2.01E-2 Score:
2 of 4
Value
Correct Answer
100%
2.01E-2 (2.01 × 10-2)
1/1
20-Sep-09 10:48 PM
View Attempt
8.
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
General Properties Comparison 1 Consider the solutions, 0.04 m urea [(NH2)2C=O)], 0.04 m AgNO3 and 0.04 m CaCl2. Which has (i) the lowest osmotic pressure, (ii) the highest vapor pressure, (iii) the highest boiling point?
Student Value Response 1. (a) 0.04 m CaCl2 (b) 0.04 m CaCl2 (c) 0.04 m CaCl2
0%
2. (a) 0.04 m urea (b) 0.04 m urea (c) 0.04 m CaCl2
100%
3. (a) 0.04 m urea (b) 0.04 m CaCl2 (c) 0.04 m CaCl2
0%
4. (a) 0.04 m CaCl2 (b) 0.04 m urea (c) 0.04 m urea
0%
5. all will be the same
0%
Score:
9.
Correct Answer
Feedback
1/1
Chapter 8 FP 9 Calculate the freezing point (in degrees C) of a solution made by dissolving 7.12 g of urea {CO(NH2)2} in 63.4 g of acetone. The Kfp of the solvent is 2.4 K/m and the normal freezing point is -93.4 degrees C.
Student Response Answer -97.9 Score:
3 of 4
Value
Correct Answer
100%
-97.89
1/1
20-Sep-09 10:48 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 7.15 g of anthracene{C14H10} in 17.6 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 85.9 Score:
Value
Correct Answer
100%
85.87
1/1
11. Chapter 8 MM bp 5 When 10.3 g of an unknown non-electrolyte is dissolved in 50.0 g of cyclohexane, the boiling point increased by 3.397 degrees C. If the Kbp of the solvent is 2.79 K/m, calculate the molar mass of the unknown solute.
Student Response Answer 169.2 Score:
Value
Correct Answer
100%
169
1/1
12. MM Osmotic Pressure 1 When 0.101 grams of a protein were dissolved in 12.8 mL of solution at 31.4 degrees C, the osmotic pressure was found to be 0.017 atm. Calculate the molar mass of the protein.
Student Response Answer 11600 Score:
Value
Correct Answer
100%
11,600
1/1
Done
4 of 4
20-Sep-09 10:48 PM
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
View Attempt 5 of unlimited Title:
Chapter 13
Started:
September 20, 2009 10:10 PM
Submitted:
September 20, 2009 10:46 PM
Time spent:
00:36:51
Total score: 10/12 = 83.33% 1.
Total score adjusted by 0.0
Maximum possible score: 12
IMF in solution 12 What is the strongest form of intermolecular force between solute and solvent in a solution of NaBr(s) in CH3OH(l)?
Student Value Response
Correct Answer
Feedback
1. ion-dipole 100% 2. dipoledipole
0%
3. hydrogen 0% bonding 4. dipoleinduced dipole
0%
5. dispersion 0% Score:
2.
0/1
Relative Solubility 10 Which of the following is more soluble in water, ethanol or CaCO3(s). 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 4 An ionic compound has a slightly 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 10:48 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 2.7. 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 .0999 Score:
5.
Value
Correct Answer
100%
0.100
1/1
Chapter 8 Molality 1 Determine the molality of a solution prepared by dissolving 4.36 g of sodium chloride in 96.4 g of water.
Student Response Answer .77 Score:
6.
Value
Correct Answer
100%
0.77
1/1
Chapter 8 PC to molal 3 A 1.63 mass % aqueous solution of nitric acid (HNO3) has a density of 1.06 g/mL. Calculate the molality of the solution.
Student Response Answer .920 Score:
7.
Value
Correct Answer
0%
0.26
0/1
Ionic Dissociation Calculation 1 How many moles of solute particles are present in 8.51 mL of 0.786 M K2SO4? Use scientific notation with 3 significant figures!!!!!
Student Response Answer 2.01E-2 Score:
2 of 4
Value
Correct Answer
100%
2.01E-2 (2.01 × 10-2)
1/1
20-Sep-09 10:48 PM
View Attempt
8.
https://scholar.uh.edu/webct/urw/lc305051878.tp305053160/ViewStudent...
General Properties Comparison 1 Consider the solutions, 0.04 m urea [(NH2)2C=O)], 0.04 m AgNO3 and 0.04 m CaCl2. Which has (i) the lowest osmotic pressure, (ii) the highest vapor pressure, (iii) the highest boiling point?
Student Value Response 1. (a) 0.04 m CaCl2 (b) 0.04 m CaCl2 (c) 0.04 m CaCl2
0%
2. (a) 0.04 m urea (b) 0.04 m urea (c) 0.04 m CaCl2
100%
3. (a) 0.04 m urea (b) 0.04 m CaCl2 (c) 0.04 m CaCl2
0%
4. (a) 0.04 m CaCl2 (b) 0.04 m urea (c) 0.04 m urea
0%
5. all will be the same
0%
Score:
9.
Correct Answer
Feedback
1/1
Chapter 8 FP 9 Calculate the freezing point (in degrees C) of a solution made by dissolving 7.12 g of urea {CO(NH2)2} in 63.4 g of acetone. The Kfp of the solvent is 2.4 K/m and the normal freezing point is -93.4 degrees C.
Student Response Answer -97.9 Score:
3 of 4
Value
Correct Answer
100%
-97.89
1/1
20-Sep-09 10:48 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 7.15 g of anthracene{C14H10} in 17.6 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 85.9 Score:
Value
Correct Answer
100%
85.87
1/1
11. Chapter 8 MM bp 5 When 10.3 g of an unknown non-electrolyte is dissolved in 50.0 g of cyclohexane, the boiling point increased by 3.397 degrees C. If the Kbp of the solvent is 2.79 K/m, calculate the molar mass of the unknown solute.
Student Response Answer 169.2 Score:
Value
Correct Answer
100%
169
1/1
12. MM Osmotic Pressure 1 When 0.101 grams of a protein were dissolved in 12.8 mL of solution at 31.4 degrees C, the osmotic pressure was found to be 0.017 atm. Calculate the molar mass of the protein.
Student Response Answer 11600 Score:
Value
Correct Answer
100%
11,600
1/1
Done
4 of 4
20-Sep-09 10:48 PM
