Chapter 7 Solutions And Colloids Worksheet With Answers Page 29
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33Solutions and Colloids 171
17. A solution is made by combining 4.00 g of sugar and 100 mL of water (density = 1.00 g/mL). What is
the concentration in % (w/w)?
a. 26.0
b. 4.00
c. 0.0400
d. 3.85
Answer:
D
18. What volume of a 10.00% (w/v) solution of sugar is needed to provide 2.00 g of sugar?
a. 0.200 liter
b. 1.00 mL
c. 20.0 mL
d. 5.00 mL
Answer:
C
19. A solution is made by dissolving 15.0 mL of oil in enough gasoline to give 50.0 mL of solution. What
is the % (v/v) of oil in the solution?
a. 30.0
b. 23.1
c. 42.9
d. 3.33
Answer:
A
20. How many grams of solid KCl are needed to prepare 250 mL of 0.235 M solution?
a. 9.32
b. 31.3
c. 15.6
d. 4.38
Answer:
D
21. How many mL of 6.00 M HCl are needed to prepare 1500 mL of 0.200 M HCl solution?
c. 2.00 × 10
a. 1.80 10
b. 125
d. 50.0
4
‐3
Answer:
D
22. Calculate the number of moles of ZnCl
in 100 mL of 0.300 M solution.
2
a. 3.00 × 10
b. 0.300
c. 30.0
d. 3.00
‐2
Answer:
A
23. A solution is prepared by adding 25.0 mL of 1.30 M AlCl
solution to a flask, and then adding enough
3
water to give a final volume of 200.0 mL. What is the molarity of the solution?
a. 0.260
b. 0.163
c. 6.50
d. 1.24
Answer:
B
24. An isotonic salt solution is 0.90% (w/w) NaCl in water. How many grams of NaCl are contained in
1.00 kg of such a solution?
a. 0.090
b. 0.90
c. 9.0
d. 90
Answer:
C
25. What volume of ethyl alcohol is contained in 35 mL (1 oz.) of 86 proof liquor, which is 43% (v/v)
alcohol?
a. 30 mL
b. 43 mL
c. 15 mL
d. 37 mL
Answer:
C
26. The boiling point of a solution of sugar water is:
a. higher than that of pure solvent.
c. lower than that of pure solvent.
b. the same as that of pure solvent.
d. impossible to determine.
Answer:
A
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