101Q3_2006key

101Q3_2006key - 2 in next (+2, -1), NaCl, NaF are the same...

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CHE 101 Summer 2006 Quiz 3 Page 1 of 4 Name ____________________________________________________ TA______________________________ For each molecule or ion draw the correct Lewis structures (including resonance structures if necessary). 1. (5 points) XeF 4 (Xe in center, all other atoms bonded to Xe only) : .. .. Xe .. .. : : F .. .. F .. F : .. F : : 2. (5 points) ClO 3 -1 (Cl in center of three O’s) O Cl O O 3. (5 points) HNO 3 (N in center between three O atoms and also contains an H-O bond) H O N O O H O N O O H O N O O
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CHE 101 Summer Session I 2006 Quiz 3 Name ____________________________________________________ 4. (5 points) Predict the relative order of ionic bond strength (lattice energy) for MgO, NaCl, NaF, CaF 2 and explain your reasoning. NaCl < NaF < CaF 2 < MgO MgO has largest ion charge product, CaF
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Unformatted text preview: 2 in next (+2, -1), NaCl, NaF are the same and lowest charges. NaF is greater than NaCl because F- is smaller than Cl-5. (5 points) Specify the formal charges on each atom in each resonance structure below for [OCSN] 3-and circle the most stable resonance structure. The electronegativities for S and N are 2.5 and 3.0, respectively. (a) C S O N : : .. .. .. .. : .. (b) C S O N : : .. .. .. .. : : (c) C S O N : : .. .. .. .. : : C C C O-1 O-1 O N-2 N-1 N-2 S S-1 S-1 (a) is most stable, since all have same values of formal charges, (a) and (b) put negative charge on O (most electronegative), but (a) has a more negative charge on N, which is more electronegative than S page 2 of 4...
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This note was uploaded on 06/05/2008 for the course CHE 101 taught by Professor Churchhill during the Summer '08 term at SUNY Buffalo.

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101Q3_2006key - 2 in next (+2, -1), NaCl, NaF are the same...

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