Extra Problems
6 Pages

Extra Problems

Course Number: CHEM 212, Spring 2009

College/University: Waterloo

Word Count: 2873

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CHEM 212 (DE) EXTRA PRACTICE PROBLEMS page 1 of 6 1. Explain (in your own words) the difference between isomeric and resonance structures. Then a) Draw two isomeric structures for HONO and use formal charges to identify which isomer is more stable. b) Draw two nonequivalent resonance structures for the most stable isomer from part a). Use formal charges to decide which of your resonance structures is most...

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CHEM 212 (DE) EXTRA PRACTICE PROBLEMS page 1 of 6 1. Explain (in your own words) the difference between isomeric and resonance structures. Then a) Draw two isomeric structures for HONO and use formal charges to identify which isomer is more stable. b) Draw two nonequivalent resonance structures for the most stable isomer from part a). Use formal charges to decide which of your resonance structures is most important. Repeat parts a) and b) for the CO 2 and HOCN molecules. 2. Draw the most important Lewis structure for H 2 SO 4 plus three additional non-equivalent Lewis structures. Show all non-zero formal charges. Clearly identify the most important structure. 3. Draw the most important Lewis structure for each of the molecules or ions. (The underlined atom is the central atom. All of the other atoms are bonded directly to the underlined atom.) Then use VSEPR theory to predict the ideal bond angles. Finally, name the molecular geometry.

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Waterloo - CHEM - 212
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