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ChapterElevenReview - 11review Student 1 According to...

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Page 1 11review Student: ___________________________________________________________________________ 1. According to valence bond theory, the triple bond in ethyne (acetylene, C 2 H 2 ) consists of A. three σ bonds and no π bonds. B. two σ bonds and one π bond. C. one σ bond and two π bonds. D. no σ bonds and three π bonds. E. none of these choices is correct 2. Valence bond theory explains the bonding in diatomic molecules such as HCl without resorting to the use of hybrid orbitals. True False 3. What type of hybridization is needed to explain why ethyne, C 2 H 2 , is linear? 4. One can safely assume that the 3 s - and 3 p -orbitals will form molecular orbitals similar to those formed when 2 s - and 2 p -orbitals interact. According to molecular orbital theory, what will be the bond order for the Cl 2 + ion?
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Page 2 5. a. In the context of valence bond theory, explain the difference in geometry between a σ and a π bond. Use a real molecule to illustrate your answer. b. What two important differences are there in the properties of σ and π bonds, in terms of how they affect the structure and reactivity of molecules? 6. A molecule with the formula AX 4 E 2 uses _________ to form its bonds. 7. Valence bond theory predicts that carbon will use _____ hybrid orbitals in the carbonate anion, CO 3 2- .
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