4) Which one of these species is a bidentate ligand? I got NH3 but not sure CN-,

ID: 820311 • Letter: 4

Question

4) Which one of these species is a bidentate ligand? I got NH3 but not sure

CN-, NH3, CO, H2NCH2CH2NH2, EDTA

5) Ethylenediaminetetr aacetic (EDTA) is I got B

A. Known to form complexes with platinum that inhibit the growth of cancerous cells.

B. An effective antidote for heavy metal poisoning (e.g., Pb2+ and Hg2+).

C. a monodentate ligand.

D. known to form unstable complex ions with Fe3+, Hg2+, and Zn2+.

E. not useful as a chelating agent.

6) Which of these is a Lewis acid but Not a Bronsted/Lowry acid?

HNC, CO32-, OH-, Cl-, Al3+ I got Al+3

7) What is the coordination number of the central metal ion in [Ni(NH3)4)(H2O)2]Cl2

0,2,4,6,8 I got 4 my classmate 6

8) In the complex ion [Fe(CN)6]4-, the oxidation number of Fe is

-4, +1, +2, +3, +6 I got +2 EXPLAIN WHY FOR POINTS

4) H2NCH2CH2NH2 . Because both Nitrogens can ligate - bidentate

5) B. An effective antidote for heavy metal poisoning (e.g., Pb2+ and Hg2+).

6) Al3+. Because it can accept lone pairs. (no hydrogens are there)

7) Coordination number is 6. (inside the coordination sphere six ligands are there)

8) +2 . Each CN- will have 1- charge (6*1- = 6-), if you add 2+ to metal you will get overall 4- charge.

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