Upload
kemal
View
31
Download
0
Embed Size (px)
DESCRIPTION
Standardized Test Preparation. Chapter 19. Preview. Multiple Choice Short Answer Extended Response. Multiple Choice. 1. In the following reaction, which species is reduced? A. K B. Br 2 C. All of the above D. None of the above. Standardized Test Preparation. Chapter 19. - PowerPoint PPT Presentation
Citation preview
Preview
• Multiple Choice
• Short Answer
• Extended Response
Standardized Test PreparationChapter 19
Standardized Test Preparation
Multiple Choice
1. In the following reaction, which species is reduced?
A. K
B. Br2
C. All of the above
D. None of the above
+22K + Br 2K + 2Br –
Chapter 19
1. In the following reaction, which species is reduced?
A. K
B. Br2
C. All of the above
D. None of the above
+22K + Br 2K + 2Br –
Chapter 19 Standardized Test Preparation
Multiple Choice
2. The oxidation number of the sulfur atom in the
A. +2.
B. −2.
C. +6.
D. +4.
24SO ion is–
Chapter 19 Standardized Test Preparation
Multiple Choice
2. The oxidation number of the sulfur atom in the
A. +2.
B. −2.
C. +6.
D. +4.
24SO ion is–
Chapter 19 Standardized Test Preparation
Multiple Choice
3. A half-reaction
A. involves a change in the oxidation state of an element.
B. always contains H2O molecules.
C. always contains H+ ions.
D. All of the above
Chapter 19 Standardized Test Preparation
Multiple Choice
3. A half-reaction
A. involves a change in the oxidation state of an element.
B. always contains H2O molecules.
C. always contains H+ ions.
D. All of the above
Chapter 19 Standardized Test Preparation
Multiple Choice
4. In the following reaction, which is the oxidizing agent?
A. AgNO2
B. Cl2C. KOH
D. KCl
2 2 3 2AgNO + Cl + 2KOH AgNO + 2KCl + H O
Chapter 19 Standardized Test Preparation
Multiple Choice
4. In the following reaction, which is the oxidizing agent?
A. AgNO2
B. Cl2C. KOH
D. KCl
2 2 3 2AgNO + Cl + 2KOH AgNO + 2KCl + H O
Chapter 19 Standardized Test Preparation
Multiple Choice
5. What are the oxidation states (in increasing order) of the element that undergoes disproportionation in the following reaction:
A. −1, 0, +2
B. −1, 0, +1
C. −2, −1, 0
D. None of the above
2 2Cl + H O HCl + HOCl
Chapter 19 Standardized Test Preparation
Multiple Choice
5. What are the oxidation states (in increasing order) of the element that undergoes disproportionation in the following reaction:
A. −1, 0, +2
B. −1, 0, +1
C. −2, −1, 0
D. None of the above
2 2Cl + H O HCl + HOCl
Chapter 19 Standardized Test Preparation
Multiple Choice
6. Which reaction is a redox reaction?
A.
B.
C.
D.
2 3 3 2Al O + 6HCl 2AlCl + 3H O
23 2 3 22HCO CO + CO + H O– –
4 2 2 3SiBr + 3H O H SiO + 4HBr
2 2 3H O + PbO + NaOH + KCl KClO + NaPb(OH)
Chapter 19 Standardized Test Preparation
Multiple Choice
2 2 3H O + PbO + NaOH + KCl KClO + NaPb(OH)
Chapter 19 Standardized Test Preparation
Multiple Choice
6. Which reaction is a redox reaction?
A.
B.
C.
D.
2 3 3 2Al O + 6HCl 2AlCl + 3H O
23 2 3 22HCO CO + CO + H O– –
4 2 2 3SiBr + 3H O H SiO + 4HBr
7. Arrange the following in order of increasing oxidation number of the sulfur atom:
A.
B.
C.
D.
2 22 3 4 6 4 2S O , S O , HSO , and H S.– – –
2 22 2 3 4 6 4H S, S O , S O , HSO– – –
2 22 3 2 4 6 4S O , H S, S O , HSO– – –
2 22 2 3 4 4 6H S, S O , HSO , S O– – –
2 24 2 3 4 6 2HSO , S O , S O , H S– – –
Chapter 19 Standardized Test Preparation
Multiple Choice
2 22 2 3 4 6 4H S, S O , S O , HSO– – –
Chapter 19 Standardized Test Preparation
Multiple Choice
7. Arrange the following in order of increasing oxidation number of the sulfur atom:
A.
B.
C.
D.
2 22 3 2 4 6 4S O , H S, S O , HSO– – –
2 22 2 3 4 4 6H S, S O , HSO , S O– – –
2 24 2 3 4 6 2HSO , S O , S O , H S– – –
2 22 3 4 6 4 2S O , S O , HSO , and H S.– – –
8. Which answer contains the correct information about the following reaction:
A. This reaction is a decomposition reaction and not a redox reaction.
B. This reaction is a redox reaction in which the lead is reduced and the oxygen is oxidized.
C. This reaction is a disproportionation reaction.
D. This reaction is a redox reaction in which the nitrogen is reduced and the oxygen is oxidized.
3 2 2 22Pb(NO ) 2PbO + 4NO + O
Chapter 19 Standardized Test Preparation
Multiple Choice
Chapter 19 Standardized Test Preparation
Multiple Choice
8. Which answer contains the correct information about the following reaction:
A. This reaction is a decomposition reaction and not a redox reaction.
B. This reaction is a redox reaction in which the lead is reduced and the oxygen is oxidized.
C. This reaction is a disproportionation reaction.
D. This reaction is a redox reaction in which the nitrogen is reduced and the oxygen is oxidized.
3 2 2 22Pb(NO ) 2PbO + 4NO + O
9. Determine the oxidation numbers for Cu in the superconductor YBa2Cu3O7.Yttrium (Y) has an oxidation number of +3. (Cu does not have oxidation numbers greater than +3.) Give only integer oxidation numbers.
Chapter 19 Standardized Test Preparation
Short Answer
9. Determine the oxidation numbers for Cu in the superconductor YBa2Cu3O7.Yttrium (Y) has an oxidation number of +3. (Cu does not have oxidation numbers greater than +3.) Give only integer oxidation numbers.
Answer: The oxidation numbers for Y, Ba, and O are +3, +2, and −2, respectively. Therefore, the sum of the oxidation numbers for the three Cu atoms must be +7. Two Cu atoms must have +2 oxidation states, and one Cu atom must have a +3 oxidation state.
Chapter 19 Standardized Test Preparation
Short Answer
10. What is an oxidizing agent?
Chapter 19 Standardized Test Preparation
Short Answer
10. What is an oxidizing agent?
Answer: An oxidizing agent is a species that causes another species to be oxidized in a redox reaction. An oxidizing agent is therefore reduced in a redox reaction.
Chapter 19 Standardized Test Preparation
Short Answer
11. B, F, K, and L are four unknown reducing agents that oxidize to singly charged cations. Using the following information, construct a table showing the relative strengths of the oxidizing and reducing agents. Data: F reduces K+, B+, and L+. B+ oxidizes K and F, but not L.
Chapter 19 Standardized Test Preparation
Extended Response
11. B, F, K, and L are four unknown reducing agents that oxidize to singly charged cations. Using the following information, construct a table showing the relative strengths of the oxidizing and reducing agents. Data: F reduces K+, B+, and L+. B+ oxidizes K and F, but not L.
Answer: Reducing
agentsOxidizingagents
F
K
B
L
F+
K+
B+
L+
Chapter 19 Standardized Test Preparation
Extended Response
12. Balance the equation for the following reaction in basic solution:
Give the balanced equation for each half-reaction and for the overall reaction. Give the oxidizing agent and the reducing agent.
2 3 2ClO KClO + KClO
Chapter 19 Standardized Test Preparation
Extended Response
12. Balance the equation for the following reaction in basic solution:
Give the balanced equation for each half-reaction and for the overall reaction. Give the oxidizing agent and the reducing agent.
Answer:
Oxidation half-reaction:
Reduction half-reaction:
Overall reaction:
This reaction is a disproportionation reaction; therefore, ClO2 is both the reducing agent and the oxidizing agent.
2 3 2ClO KClO + KClO
e2 3 22OH + ClO ClO + + H O– – –
e 2 2ClO + ClO– –
2 3 2 22ClO + 2KOH KClO + KClO + H O
Chapter 19 Standardized Test Preparation
Extended Response