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Multiple Choice Quiz A



 This activity contains 15 questions.

Question 1
1
Open Hint for Question 1 in a new window		 Which of these compounds will be the most soluble and the least soluble in water?

KCl, hexane (CH3CH2CH2CH2CH2CH3), benzoic acid (C6H5COOH)
 
End of Question 1


Question 2
2
Open Hint for Question 2 in a new window		 Identify the most important solute-solvent interactions in a solution of ethylene glycol (HOCH2CH2OH) and hexane (CH3CH2CH2CH2CH2CH3).
 
End of Question 2


Question 3
3
Open Hint for Question 3 in a new window		 The substances shown below are substances that are part of the human body or that are consumed every day. Using what you know about hydrophilic and hydrophobic solutes, identify which one or ones are likely to be excreted quickly from the human body. Quiz13AQ03S
 
End of Question 3


Question 4
4
Open Hint for Question 4 in a new window		 What is the mole fraction of HCl if the solution contains 5.00 grams HCl per 100.0 grams solution?
 
End of Question 4


Question 5
5
Open Hint for Question 5 in a new window		 If the contamination of benzene (C6H6) in the river is 1.23 ppm, calculate the molarity of benzene in river water. Assume that the density of the river water is 1.00 g/mL.
 
End of Question 5


Question 6
6
Open Hint for Question 6 in a new window		 Which statement is true?
 
End of Question 6


Question 7
7
Open Hint for Question 7 in a new window		 Calculate the concentration of carbon dioxide dissolved in 1.0 L of pop, at 25oC, if the manufacturer uses a pressure of 2.7 atm of CO2 in the pop. The solubility of CO2 at 25oC is 3.4 x 10-2 M/atm.
 
End of Question 7


Question 8
8
Open Hint for Question 8 in a new window		 Determine the vapor pressure of a solution at 300 K that has 12.00 grams of ethylene glycol (HOCH2CH2OH) dissolved in 50.0 grams of H2O. The vapor pressure of pure water at 300 K is 26.5 mmHg.
 
End of Question 8


Question 9
9
Open Hint for Question 9 in a new window		 Consider a solution of CCl4 in methanol (CH3OH) and a solution of methanol in acetone (CH3COCH3). Decide whether the vapor pressure will be higher than that predicted by Raoult's Law, about the same as that predicted by Raoult's Law, or lower than that predicted by Raoult's Law.
 
End of Question 9


Question 10
10
Open Hint for Question 10 in a new window		 By how much will the boiling point rise if 12.0 grams of ethylene glycol is present in 50.0 grams of water at 300 K? Kb for water is 0.513 oC/m.
 
End of Question 10


Question 11
11
Open Hint for Question 11 in a new window		 By how much will the freezing point fall if 12.0 grams of ethylene glycol is present in 50.0 grams of water at 300 K? Kf for water is 1.86 oC/m.
 
End of Question 11


Question 12
12
Open Hint for Question 12 in a new window		 Which of these substances will lower the freezing point of water the most?

0.10 m NaCl, 0.10 m KCl, 0.10 m CaCl2, 0.10 m benzoic acid
 
End of Question 12


Question 13
13
Open Hint for Question 13 in a new window		 What is the osmotic pressure of a 0.0400 M aqueous solution of HCl at 25oC?
 
End of Question 13


Question 14
14
Open Hint for Question 14 in a new window		 This solution is not filterable and does not separate upon standing overnight. What kind of solution is it?
 
End of Question 14


Question 15
15
Open Hint for Question 15 in a new window		 What is the molality of a 4.61% NaCl solution?
 
End of Question 15


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