chris quiz 4

chris quiz 4 - CHEM 6C Spring 2006 Section C08 TA: Chris...

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CHEM 6C Spring 2006 Name: _____________ KEY ____________ Section C08 TA: Chris Meier Quiz #4: “The Elements: The First Four Main Groups” II May 10, 2006 You must show your work, when applicable, for all problems in order to receive credit. Please read the questions carefully and be sure to answer all parts. 1. What is the general electron configuration for the group 13/III elements? (1) ns 2 np 1 What are their possible oxidation states? (1) +1, +3 2. Explain the corrosion resistance of aluminum (Al). (1) it is passivated in air by an oxide film that prevents it from further reaction with the air 3. Draw the Lewis structure for BF 3 . (1) Would you expect this compound to act as a Lewis acid or as a Lewis base? (1) B F F F Lewis acid 4. Given that 2 Al(s) + 3 Cl 2 (g) 2 AlCl 3 (s), discuss how is Al 2 Cl 6 subsequently formed or name the property of aluminum that allows for this to occur. (1) the Al of one AlCl 3 fragment acts as a Lewis acid while the Al of the other acts as a Lewis base;
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chris quiz 4 - CHEM 6C Spring 2006 Section C08 TA: Chris...

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