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MC |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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The pH of a solution that is formed by the neutralization of 1.0 M H2SO4 and 1.0 M KOH is closest to
a. 1
b. 7
c. 10
d. 4
Correct Answer: d
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MC |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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What is the pH of a 0.0001 M aqueous solution of HCl?
a. 1
b. 2
c. 3
d. 4
Correct Answer: d
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MC |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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As an aqueous solution becomes more acidic, the hydroxide ion concentration
a. decreases
b. increases
c. remains the same
Correct Answer: a
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MC |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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A solution has a hydroxide ion concentration of 1 x 10-5 M. What is the hydrogen ion concentration of the solution?
a. 1 x 10-1
b. 1 x 10-5
c. 1 x 10-9
d. 1 x 10-14
Correct Answer: c
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MC |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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What is the pH of a 0.001 M HNO3 solution?
a. 1
b. 2
c. 3
d. 11
Correct Answer: c
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MC |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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What is the pH of a solution that results from the complete neutralization of an HCl solution with KOH solution?
a. 1
b. 7
c. 10
d. 4
Correct Answer: b
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MC |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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The [H3O+] of a solution is 1 x 10-8. This solution has a pH of
a. 6, which is acidic
b. 8, which is basic
c. 6, which is basic
d. 8, which is acidic
Correct Answer: b
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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The pH of a solution with a concentration of 0.01 M hydrochloric acid is
a. 10-12
b. 10-2
c. 10.0
d. 2.0
e. 12.0
Correct Answer: d
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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Which of these solutions is most basic?
a. [H+]= 1 x 10-2
b. [H+]= 1 x 10-10
c. [OH-]= 1 x 10-5
d. [OH-]= 1 x 10-7
e. [OH-]= 1 x 10-10
Correct Answer: b
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MC |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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Using the diagram above, answer the following questions:
1. Container 1 has 100 mL of a solution with a pH of 4. How many mL of this solution should be added to water in the container 2 to make a total volume of 100 mL with a pH of 6?
2. How many mL of water will be need in container 2?
3. Add arrows and labels to the diagram to indicate the procedure necessary to make this dilution.
4. If 10 mL of the solution in container 2 (pH =6) is added to 90 mL of water in container 3, what will the pH of the solution be in container 3?
5. Add drawings to the diagram to indicate the procedure necessary to make this dilution.
Ideal Answers and Scoring Guide:
1. volume needed = (1.0 x 10-6
M [H+]) (100 mL) = 1.00 mL
1.0 x 10-4 M [H+]
2. 90 mL of water need to be added 2 pts
4. new pH = (1.0 x 10-6) x (10 mL)
= -log [1.0 x 10-7] = 7
(100 mL)
use of correct concentrations 2 pts each equation 4 pts
correct use of units, 2 pts each equation 4 pts
accurate drawing, 2 pts each 4 pts
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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Equal volumes of 0.1 M NaOH and 0.1 M HCl are thoroughly mixed. The resulting solution has a pH closest to
a. 5
b. 7
c. 3
d. 9
Correct Answer: b
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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Given the following solutions:
Solution A: pH of 10
Solution B: pH of 7
Solution C: pH of 5
Which list has the solutions placed in order of increasing H+ concentration?
a. A, B, C
b. B, A, C
c. C, A, B
d. C, B, A
Correct Answer: a
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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1. A hydrogen ion [H+] concentration of 1.0 x 10-3 is best represented by which pH?
a. pH 1.00
b. pH 2.00
d. pH 3.00
d. pH 4.00
e. pH 5.00
2. A hydrogen ion [H +1 concentration of 1.0 x10-8 is best represented by which pH?
a. pH 4.00
b. pH 5.00
c. pH 6.00
d. pH 7.00
e. pH 8.00
Correct Answers:
1. c
2. e
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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Botulism is the deadliest form of bacterial food poisoning. When canning salsa, tomatoes are usually acidic enough to prevent the growth of the bacteria and the production of its deadly toxin. However, when other ingredients that are not as acidic such as green peppers, onions, and jalapenos are added, the salsa may not be acidic enough to prevent the food poisoning. What household ingredient could be added to the salsa to make it more acidic?
a. vinegar
b. baking soda
c. sugar
d. water
e. salt
Correct Answer: a
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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1. A hydrogen ion [H+] concentration of 2.68 x10-3 is best represented by which pH?
a. pH 0.32
b. pH 1.82
c. pH 2.57
d. pH 4.69
e. pH 5.21
2. A hydrogen ion [H+] concentration of 7.84 x 10-8 is best represented by which pH?
a. pH 4.77
b. pH 5.45
c. pH 6.37
d. pH 7.10
e. pH 7.55
Correct Answers:
1. c
2. d
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
||
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ILO: |
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What is the molarity of a nitric acid solution, HNO3, if 20.0 mL of the solution is needed to exactly neutralize 10.0 mL of a 1.67 M NaOH solution?
a. 3.34 M
b. 1.67 M
c. 0.835 M
d. 0.334 M
Correct Answer: c
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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As an acid solution is added to neutralize a base solution, the OH- concentration of the base solution
a. decreases
b. increases
c. remains the same
Correct Answer: a
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
||
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ILO: |
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How many milliliters of a 0.20 M KOH are needed to completely neutralize 90.0 milliliters of 0.10 M HCl?
a. 25 mL
b. 45 mL
c. 90 mL
d. 180 mL
Correct Answer: b
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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How many milliliters of 0.600 M H2SO4 are required to exactly neutralize 100 milliliters of 0.300 M Ba(OH)2?
a. 25.0 mL
b. 50.0 mL
c. 100.0 mL
d. 200.0 mL
Correct Answer: b
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
||
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ILO: |
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How many liters of 2.5 M HCl are required to exactly neutralize 1.5 liters of 5.0 M NaOH?
a. 1.0 L
b. 2.0 L
c. 3.0 L
d. 4.0 L
Correct Answer: c
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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If 5.0 milliliters of a 0.20 M HCL solution is required to neutralize exactly 10 milliliters of NaOH, what is the concentration of the base?
a. 0.10 M
b. 0.20 M
c. 0.30 M
d. 0.40 M
Correct Answer: a
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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When 50 milliliters of an HNO3 solution is exactly neutralized by 150 milliliters of a 0.50 M solution of KOH, what is the concentration of HNO3?
a. 1.0 M
b. 1.5 M
c. 3.0 M
d. 0.5 M
Correct Answer: b
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MC |
Chemistry |
Standard: 06 |
|
Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
||
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ILO: |
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If 50.0 mL of hydrochloric acid is neutralized using 10.0 mL of 2.0 M sodium hydroxide, what is the concentration of the acid?
a. 40 M
b. 10 M
c. 2.5 M
d. 1.0 M
e. 0.4 M
Correct Answer: e
Calculations: 50 * c = (10) (20)
c = (200)/(50) = 0.4 M
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I |
Chemistry |
Standard: 06 |
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Objective:
03. Differentiate between acids and bases in terms of hydrogen
ion concentration. |
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ILO: |
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1. Which set of samples has the highest acid concentration?
a. 2 and 9
b. 5 and 8
c. 3 and 10
d. 1 and 12
e. 7 and 11
2. Which set of samples has the lowest acid concentration?
a. 1 and 12
b. 2 and 9
c. 3 and 10
d. 5 and 8
e. 7 and 11
Correct Answers:
1. a
2. e
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I |
Chemistry |
Standard: 06 |