249 7 Chemical Bonding Ex Ans

249 7 Chemical Bonding Ex Ans - 249 College Chemistry I...

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249 College Chemistry I  1. Draw the Lewis structures for the following molecules. (a) OCS (e) P 4 (i) SeCl 4 (b) N 2 F 2 (f) Si 2 H 6 (j) XeF 4 (c) N 2 H 4 (g) COBr 2 (k) HClO 3 (d) PH 3 (h) SOCl 2 (l) H 2 SO 4 1
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2. Write Lewis structures for the reaction: AlCl 3 + Cl - AlCl 4 - What kind of bond joins Al and Cl in the product? Dative / Coordinate covalent bond 3. Draw all resonance structures for SO 3 2- . 4. Why is the bond angle in NF 3 smaller than that in NH 3 ? Because F is more electronegative than H, the bonding electrons are nearer to F than H, and therefore bond – pair / bond – pair repulsion is smaller in NF 3 than in NH 3 . 2
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5. Determine the kind of hybrid orbitals used by sulfur in SF 4 , and explain the bonding in this molecule according to valence bond theory. Step 1:
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249 7 Chemical Bonding Ex Ans - 249 College Chemistry I...

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