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WorksheetsColligative
Total questions: 9
Worksheet time: 37mins
Name
Class
Date
1.
What observation(s) reflect(s) colligative properties?
I. A 0.5 m NaBr soln has a higher vapor pressure than 0.5 m BaCl2 soln.
II. A 0.5 m NaOH soln freezes at a lower T. than pure water.
III. Pure water freezes at a higher T than pure methanol.
I. A 0.5 m NaBr soln has a higher vapor pressure than 0.5 m BaCl2 soln.
II. A 0.5 m NaOH soln freezes at a lower T. than pure water.
III. Pure water freezes at a higher T than pure methanol.
a)
only I
b)
only II
c)
only III
d)
1 & II
2.
What observation(s) reflect(s) colligative properties?
I. A 0.5 m NaBr soln has a higher vapor pressure than 0.5 m BaCl2 soln.
II. A 0.5 m NaOH soln freezes at a lower T. than pure water.
III. Pure water freezes at a higher T than pure methanol.
I. A 0.5 m NaBr soln has a higher vapor pressure than 0.5 m BaCl2 soln.
II. A 0.5 m NaOH soln freezes at a lower T. than pure water.
III. Pure water freezes at a higher T than pure methanol.
a)
only I
b)
only II
c)
only III
d)
1 & II
3.
Consider the following liquids. Which pairs are miscible?
1. benzene & hexane
2. water & methanol (CH3OH)
3. water & hexane
1. benzene & hexane
2. water & methanol (CH3OH)
3. water & hexane
a)
1, 2 only
b)
2 only
c)
1 only
d)
1, 2, 3
4.
Calculate the mole fraction of ethanol, C2H5OH, in a solution that contains 46 g of ethanol & 64 g of methanol CH3OH.
a)
1/3
b)
0.42
c)
1/2
d)
2/3
5.
The vap. pres. of pure water at 85 oC is 434 mmHg. What is the vap. pres. of a solution of 100 g of water & 150 g of diglyme, C6H14O3, a nonvolatile substance?
a)
361 mmHg
b)
390 mmHg
c)
425 mmHg
d)
388 mmHg
6.
A 250 mL solution containing 21.4 g of polymer in toluene had an osmotic pressure of 0.055 atm at 27 oC. What is the formula weight of the polymer?
a)
15,000 g/mol
b)
26,000 g/mol
c)
32,000 g/mol
d)
38,000 g/mol
7.
The boiling point of a solution is ______ the boiling point of the pure solvent.
a)
higher than
b)
the same as
c)
lower than
d)
higher or lower than
8.
The freezing point of a solution is ____ the freezing point of the pure solvent.
a)
the same as
b)
lower than
c)
higher than
d)
no relation to
9.
58 grams of NaCl is added to 2 kg of water. What is the molality of the solution?
a)
29 m
b)
1 m
c)
0.50 m
d)
none of these
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