3 describe the following reaction in terms of the

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Chapter 2 / Exercise 54
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3. Describe the following reaction in terms of the Lewis theory of acids and bases: (4 points) AlCl 3 ( s ) + Cl ( aq ) → AlCl 4 ( aq ) (Reference: Chang 15.94) 1 Copyright © 2014 by Thomas Edison State College. All rights reserved.
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Chapter 2 / Exercise 54
Chemistry
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4. Which would be considered a stronger Lewis acid: (a) BF 3 or BCl 3 , (b) Fe +2 or Fe +3 ? Explain. (4 points) (Reference: Chang 15.95) 5. Complete the following statements for the complex ion [Co(en) 2 (H 2 O)CN] 2+ . (16 points)\ a. en is the abbreviation for: b. The oxidation number of Co is: c. The coordination number of Co is: d. ______ is a bidentate ligand. (Reference: Chang 23.11) 6. Give the oxidation numbers of the metals in the following species: (12 points) a. K 3 [Fe(CN) 6 ] b. K 3 [Cr(C 2 O 4 ) 3 ] c. [Ni(CN) 4 ] 2– (Reference: Chang 23.13) 7. What are the systematic names for the following ions and compounds? (12 points) a. [Co(NH 3 ) 4 Cl 2 ] + b. Cr(NH 3 ) 3 Cl 3 c. [Co(en) 2 Br 2 ] + d. [Co(NH 3 ) 6 ]Cl 3 (Reference: Chang 23.15) 2 Copyright © 2014 by Thomas Edison State College. All rights reserved.
8. Write the formulas for each of the following ions and compounds: (12 points) a. tetrahydroxozincate(II) b. pentaaquochlorochromium(III) c. tetrabromocuprate(II) d. ethylenediaminetetraacetatoferrate(II) (Reference: Chang 23.17) 9. Oxalic acid, H 2 C 2 O 4 , is sometimes used to clean rust stains from sinks and bathtubs. Explain the chemistry underlying this cleaning action. (3 points) (Reference: Chang 23.41) 10. The label of a certain brand of mayonnaise lists EDTA as a food preservative. How does EDTA prevent the spoilage of mayonnaise? (3 points) (Reference: Chang 23.66) 3 Copyright © 2014 by Thomas Edison State College. All rights reserved.

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