Chem 1075 Chapter 17 Oxidation and Reduction Learning Goals / Study Guide
Suggested Homework:
Key Concepts (p. 487): 1, 2, 3 (Answers in Appendix H)
Exercises (p. 488): 1, 3, 5, 7, 9, 11, 13, 15, 17, 63
Learning Goals:
1. Be able to assign oxidation numbers to elements, ions, atoms in compounds, atoms in polyatomic ions.
2. Be able to determine what is being oxidized or reduced in a redox reaction.
3. Be able to determine the oxidizing agent and reducing agent for a redox reaction.
4. OMIT Sec. 17.3, 17.4 Balancing redox reactions
5. OMIT Sec. 17. 5 Spontaneous reactions
6. OMIT Sec. 17.6, 17.7 Electrolytic & Voltaic cells
Extra Practice:
1. Assign the oxidation numbers to each atom in the following reaction:
Cl2(g) + 2 NaF(s) —> 2 NaCl(aq) + F2(g)
2. Determine what is being oxidized: _________ is being oxidized from _____ to _____
3. Determine what is being reduced: __________is being reduced from _____ to _____
4. The oxidizing agent would be ______________
5. The reducing agent would be ______________
6. The oxidation number for Br would be greatest in which formula?
HBrO2HBrO HBrO3HBrO4
7. Calculate the oxidation number on S in S4O62-.
Answers: 1. Cl2 = 0, NaF has Na+ and F1-, NaCl has Na1+ and Cl1-, F2 = 0; 2. F1- is being oxidized from 1- to
0; 3. Cl2 is being reduced from 0 to -1; 4. The oxid agent is Cl2; 5. The red agent is F1- or NaF; 6. HBrO2
has
Br=+3; HbrO has Br=+1; HBrO3 has Br=+5; HBrO4 has Br=+7; 7. S = +5/2 or 2.5 (can have some
fractional oxidation number)
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