Study_Guide-2_10

Study_Guide-2_10 - CHEM/ENVS 380 Spring 10 Study Guide for...

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CHEM/ENVS 380 Spring 10 Study Guide for Exam-2 Please remember to bring a calculator with you on the day of the test. Lecture-7 (Oxidation and Reduction) 1. Know the rules for assigning oxidation numbers. Be able to determine the oxidation numbers of elements in various compounds encountered in class (e.g., oxidation number of S in H 2 SO 4 and H 2 SO 3 ). 2. What is an oxidation reaction? Reduction reaction? If a chemical is oxidized/reduced, does it gain/lose electrons? What is meant by a redox reaction? 3. Why is Earth’s atmosphere oxidizing? 4. What do the following reactions represent? CO 2 + H 2 O + light “CH 2 O” + O 2 (eq.1) “CH 2 O” + O 2 CO 2 + H 2 O (eq.2) a. In eq.1, is C undergoing oxidation or reduction? b. In eq.2, is C undergoing oxidation or reduction? c. Which is an energy-yielding reaction? Which reaction requires energy for it to proceed? 5. In what ways does life on Earth benefit from redox reactions? How do we benefit from redox reactions on a daily basis? Lecture-8 (Ground-Level Air Pollution) 1. For the ground level air pollutants CO, SO 2 , CH 4 , NOx, particulate matter, ozone, Hg, know: a. Anthropogenic source(s) b. Natural source(s) c. Why it is an environmental hazard 2. Why are hydroxyl radicals (OH∙) called the “tropospheric vacuum cleaner”? 3. What is the difference between a classic (London) smog and a photochemical (LA) smog? 4. Name two mechanisms via which NO is produced in the internal combustion engine. What is the source of N in these reactions? 5. What is the environmental significance of NO production? 6. What is the most likely fate of NO upon emission into the atmosphere? 7.
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This note was uploaded on 09/23/2011 for the course CHEM 380 taught by Professor Staff during the Spring '11 term at S.F. State.

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Study_Guide-2_10 - CHEM/ENVS 380 Spring 10 Study Guide for...

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