Chem 202 Exam 1 with Questions and
Answers
Which of the following factors affect the solubility of a gas in a liquid solvent?
1. Pressure
2. Temperature
3. Identity of Gas
A. 1 only
B. 1 and 2
C. 2 only
D. 1, 2, and 3
E. 3 only ANSWER D. 1, 2, and 3
The solubility of a salt in H2O is 10g/L at 25 C. If you put 11 g of this salt in 1 L H2O at 25
C, the solution is:
A. Saturated
B. Unsaturated
C. Supersaturated
D. All of the above ANSWER A. Saturated
Which of the following statements is true about the solubility of N2 (g) in CH3OH (l)?
A. N2 will be more soluble at higher temperatures
B. The solubility of N2 will be independent of temperature
, C. N2 will not be soluble at all in CH3OH.
D. N2 will be more soluble at higher partial pressures of N2 ANSWER D. N2 will be more
soluble at higher partial pressures of N2
At a particular temperature, the solubility of Xe in water is 0.0650 M when the partial
pressure is 0.0850 atm. What will the solubility (in M) be when the partial pressure of Xe is
2.41 atm? ANSWER 1.84 M
The phrase 'like dissolves like' refers to
A. Two molecules having the same chemical formula
B. Two molecules having the same molar mass
C. Two molecules having the same intermolecular forces
D. Two molecules having the same temperature ANSWER C. Two molecules having the
same intermolecular forces
Which of the following best describes what takes place during the solvation process?
A. Molecules of the solute are attracted to one another more than the solvent
B. Solvent molecules surround solute molecules and pull them out into the solution
C. Molecules of the solvent are attracted to one another and exude solute molecules
D. Solvent and solute molecules arrange themselves along a boundary ANSWER B. Solvent
molecules surround solute molecules and pull them out into the solution
Which one of the following is the correct dissociation equation for Li₂CO₃?
A. Li+ (aq) + CO3^2- (aq) ==> Li2CO3 (s)
Answers
Which of the following factors affect the solubility of a gas in a liquid solvent?
1. Pressure
2. Temperature
3. Identity of Gas
A. 1 only
B. 1 and 2
C. 2 only
D. 1, 2, and 3
E. 3 only ANSWER D. 1, 2, and 3
The solubility of a salt in H2O is 10g/L at 25 C. If you put 11 g of this salt in 1 L H2O at 25
C, the solution is:
A. Saturated
B. Unsaturated
C. Supersaturated
D. All of the above ANSWER A. Saturated
Which of the following statements is true about the solubility of N2 (g) in CH3OH (l)?
A. N2 will be more soluble at higher temperatures
B. The solubility of N2 will be independent of temperature
, C. N2 will not be soluble at all in CH3OH.
D. N2 will be more soluble at higher partial pressures of N2 ANSWER D. N2 will be more
soluble at higher partial pressures of N2
At a particular temperature, the solubility of Xe in water is 0.0650 M when the partial
pressure is 0.0850 atm. What will the solubility (in M) be when the partial pressure of Xe is
2.41 atm? ANSWER 1.84 M
The phrase 'like dissolves like' refers to
A. Two molecules having the same chemical formula
B. Two molecules having the same molar mass
C. Two molecules having the same intermolecular forces
D. Two molecules having the same temperature ANSWER C. Two molecules having the
same intermolecular forces
Which of the following best describes what takes place during the solvation process?
A. Molecules of the solute are attracted to one another more than the solvent
B. Solvent molecules surround solute molecules and pull them out into the solution
C. Molecules of the solvent are attracted to one another and exude solute molecules
D. Solvent and solute molecules arrange themselves along a boundary ANSWER B. Solvent
molecules surround solute molecules and pull them out into the solution
Which one of the following is the correct dissociation equation for Li₂CO₃?
A. Li+ (aq) + CO3^2- (aq) ==> Li2CO3 (s)
