AP Chemistry
Tutoring questions 17/02/21
Test Booklet
Name
1. Solid Al(NO ) is added to distilled water to produce a solution in which the concentration of nitrate, [NO -],
3 3
3
is 0.10 M. What is the concentration of aluminum ion, [Al3+], in this solution?
A
0.010 M
B
0.033 M
C
0.066 M
D
0.10 M
E
0.30 M
2. A 0.20 mol sample of MgCl2(s) and a 0.10 mol sample of KCl(s) are dissolved in water and diluted to 500
mL. What is the concentration of Cl- in the solution?
A
0.15 M
B
0.30 M
C
0.50 M
D
0.60 M
E
1.0 M
A student uses visible spectrophotometry to determine the concentration of
in a sample solution. First
the student prepares a set of
solutions of known concentration. Then the student uses a
spectrophotometer to determine the absorbance of each of the standard solutions at a wavelength of
and
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AP Chemistry
Test Booklet
Tutoring questions 17/02/21
constructs a standard curve. Finally, the student determines the absorbance of the sample of unknown
concentration.
3.
The original solution used to make the solutions for the standard curve was prepared by dissolving
of
(molar mass
) in enough water to make
of solution. What is the molar
concentration of the solution?
A
B
C
D
4. If 50. mL of 1.0 M NaOH is diluted with distilled water to a volume of 2.0 L, the concentration of the
resulting solution is
A
0.025 M
B
0.050 M
C
0.10 M
D
0.50 M
E
1.0 M
5. If 200. mL of 0.60 M MgCl2(aq) is added to 400. mL of distilled water, what is the concentration of
Mg2+(aq) in the resulting solution? (Assume volumes are additive).
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Test Booklet
Tutoring questions 17/02/21
A
0.20 M
B
0.30 M
C
0.40 M
D
0.60 M
E
1.2 M
6. What is the molarity of I-(aq) in a solution that contains 34 g of SrI (molar mass 341 g) in 1.0 L of the
2
solution?
A
0.034 M
B
0.068 M
C
0.10 M
D
0.20 M
E
0.68 M
7. When 70. milliliter of 3.0-molar Na2CO3 is added to 30. milliliters of 1.0-molar NaHCO3 the resulting
concentration of Na+ is
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AP Chemistry
Test Booklet
Tutoring questions 17/02/21
A
2.0 M
B
2.4 M
C
4.0 M
D
4.5 M
E
7.0 M
8. A 40.0 mL sample of 0.25 M KOH is added to 60.0 mL of 0.15 M Ba(OH)2. What is the molar concentration
of OH-(aq) in the resulting solution? (Assume that the volumes are additive.)
A
0.10 M
B
0.19 M
C
0.28 M
D
0.40 M
E
0.55 M
9. A student wishes to prepare 2.00 liters of 0.100–molar KIO3 (molecular weight 214). The proper procedure
is to weigh out
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AP Chemistry
Test Booklet
Tutoring questions 17/02/21
A
42.8 grams of KIO3 and add 2.00 kilograms of H2O
B
42.8 grams of KIO3 and add H2O until the final homogeneous solution has a volume of 2.00 liters
C
21.4 grams of KIO3 and add H2O until the final homogeneous solution has a volume of 2.00 liters
D
42.8 grams of KIO3 and add 2.00 liters of H2O
E
21.4 grams of KIO3 and add 2.00 liters of H2O
10. Approximately what mass of CuSO • 5H O (250 g mol -1 ) is required to prepare 250 mL of 0.10 M
4
2
copper(II) sulfate solution?
A
4.0 g
B
6.2 g
C
34 g
D
85 g
E
140 g
11. A 360. mg sample of aspirin, C9H8O4, (molar mass 180. g), is dissolved in enough water to produce 200. mL
of solution. What is the molarity of aspirin in a 50. mL sample of this solution?
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AP Chemistry
Test Booklet
Tutoring questions 17/02/21
A
0.0800 M
B
0.0400 M
C
0.0200 M
D
0.0100 M
E
0.00250 M
12. A student prepares a solution by dissolving 60.00 g of glucose (molar mass 180.2 g mol -1) in enough
distilled water to make 250.0 mL of solution. The molarity of the solution should be reported as
A
12.01 M
B
12.0 M
C
1.332 M
D
1.33 M
E
1.3 M
13. How many moles of
ions are in
of
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?
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AP Chemistry
Test Booklet
Tutoring questions 17/02/21
A
B
C
D
14.
How many grams of
ions?
(molar mass
) are needed to prepare
of
A
B
C
D
15. The volume of water that must be added in order to dilute 40 mL of 9.0 M HCl to a concentration of 6.0 M
is closest to
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AP Chemistry
Test Booklet
Tutoring questions 17/02/21
A
10 mL
B
20 mL
C
30 mL
D
40 mL
E
60 mL
16. How many mL of 10.0 M HCl are needed to prepare 500. mL of 2.00 M HCl ?
A
1.00 mL
B
10.0 mL
C
20.0 mL
D
100. mL
E
200. mL
17. The volume of distilled water that should be added to 10.0 mL of 6.00 M HCl(aq) in order to prepare a
0.500 M HCl(aq) solution is approximately
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Test Booklet
Tutoring questions 17/02/21
A
50.0 mL
B
60.0 mL
C
100. ML
D
110. ML
E
120. mL
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