Chem II Chapter 13
Cancel
-
+
This quiz is to review for the Chapter 13 test.
- 1.What increases when 2 pure substances are mixed to form a solution?
- A.
Heat
- B.
Entropy
- C.
Solubilty
- D.
Nothing increases
- 2.What is the molality of a solution of 50 g of CH3CH2CH2OH in 152 mL water, if the density of water is 1 g/mL?
- A.
5.47 m
- B.
0.00547 m
- C.
0.833m
- D.
0.183m
- 3.A 2.300 molal solution of KCl is prepared. How many grams of KCl are present in a sample containing 5.0 kg of water?
- A.
546.7 g
- B.
856.8 g
- C.
113.7g
- D.
74.5g
- 4.The solubility of oxygen gas in water is 0.590 g/L at a pressure of 15 atm. What is the Henry's law constant for oxygen gas in units of L-atm/mol?
- A.
0.00393
- B.
0.00123
- C.
814
- D.
1.26
- 5.At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene(vapor pressure of pure toluene = 290 torr). The mole fraction of benzene in solution is 0.59. Assuming ideal behavior, calculate the mole fraction of toluene in the vapor above the solution.
- A.
0.123
- B.
0.778
- C.
0.641
- D.
0.359
- 6.150g of NaCl dissolves in 1 kg of water at 25oC. the vapor pressure of pure water at this temperature is 23.8 torr. Determine the vapore pressure of the solution.
- A.
21.8 torr
- B.
22.5 torr
- C.
20.6 torr
- D.
19.7 torr
- 7.
- A.
92 g/mol
- B.
215 g/mol
- C.
118 g/mol
- D.
314 g/mol
- 8.Colligative properties depend on ..
- A.
The chemical properties of the solute
- B.
The chemical properties of the solvent
- C.
The masses of the individual ions
- D.
The number of particles dissolved
- 9.Raoult's law relates the vapor pressure of the solvent above the soltion to its mole fraction in the solutio. Which of the following is an accurate statement?
- A.
Raoult's law applies exactly to all solutions
- B.
Raoult's law works best when applied to concentrated solutions
- C.
Roaults law works best when applied to dilute solutions
- D.
Raoult's law applies only to non-ideal solutions
- 10.The Tyndall effect..
- A.
Is observed in concentrated solutions
- B.
Is obsreved only in dilute solultions
- C.
Is observed in colloidal dispersions
- D.
Is caused by Brownian motion
- 11.
- A.
160 g/mol
- B.
80 g/mol
- C.
120 g/mol
- D.
140 g/mol
- 12.Calculate the molarity of a solution contians KCl and water whose osmotic pressure at 21oC is 100 torr.
- A.
0.005 M
- B.
0.01 M
- C.
0.08 M
- D.
0.0025 M
Back to top
