Need Chem 2 Help ... please explain?

Question

9. In the compound, CaNa[Fe(CN)6], what ligands are in the coordination sphere?
A. Ca2+
B. Na+
C. CN-
D. H2O
E. none of these
10. What are the respective central-metal oxidation state, coordination number, and overall charge on the complex ion in
Na2[Cr(NH3)2(NCS)4]?
A. +3; 6; -1
B. +3; 6; +1
C. +2; 6; -2
D. +2; 4; -1
E. +1; 6; -2
11. In the following reaction, Ni2+ is acting as a(n) __________.
Ni2+ (g) + 6H2O (l) → Ni(H2O)62+ (aq)
A. oxidizing agent
B. Lewis acid
C. precipitating agent
D. solvent
E. ligand
12. Which one of the following species is paramagnetic?
A. Cu+
B. Cr3+
C. Zn
D. Ca
E. Ag+
13. How many d electrons are in the cobalt ion of K3[Co(CN)6]?
A. 3
B. 5
C. 6
D. 7
E. 4
14. What is the charge on the complex ion in Mg2[FeCl6]?
A. 2-
B. 2+
C. 3-
D. 3+
E. 4-
15. What is the oxidation number of chromium in [Cr(NH3)4Cl2]Cl?
A. -3
B. +3
C. +2
D. -2
E. 0

Answer 1

9. CN-

10. C

11. B

12.

13. C

14. E

15. B

Answer 2

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