transition metals

Question 1

Transition metal

Answer 1

They are elements that can form stable ions with partially filled d orbitals.

Question 2

complex ion

Answer 2

A molecule consisting of a central metal ion with molecules surrounding it

Question 3

ligand

Answer 3

can form dative covalent bonds by donating a pair of electrons to the bond

Question 4

coordination number

Answer 4

is the number of coordinate bonds formed

Question 5

monodentate ligands

Answer 5

form one dative bond eg H2O cl- CN- NH3

Question 6

optical isomers

Answer 6

Are non superimposable mirror images of each other

Question 7

How does cis platin work

Answer 7

Binds to the nitrogens on the bases in DNA and undergoes ligand substitution. The chlorines are replaced by water which distorts the shape of DNA

Question 8

Haemoglobin

Answer 8

Contains haem which has a central metal iron ion that forms dative covalent bonds with O2. Oxygen is a weak ligand so breaks off easily to transport to cells. CO is a stronger ligand than O2 which turns haem dark red if poisoning occurred.

Question 9

[Cu(H20)6]2+ ADD CONC HCL

Answer 9

[Cu(H2O)6]2+ +4Cl- =[CuCl4]2-+6H2O
from blue to yellow solution and changes shape from octahedral tp tetrahedral

Question 10

[Cu(H20)6]2+ add NaOH

Answer 10

Cu2+ +2OH- =Cu(OH)2 blue to ple blue precipitate and no reaction in excess

Question 11

[Cu(H20)6]2+ add NH3

Answer 11

Cu2+ +2OH- =Cu(OH)2
Cu(OH)2(h20)4+4Nh3=[Cu(H20)2(NH3)4]+2H20
BLUE PRECIPITATE TO DARK BLUE SOLUTION

Question 12

[Cr(H20)6]3+ ADD NaOH

Answer 12

C

Question 13

how does ligand substitution allow oxygen to be transported

Answer 13

oxygen binds to fe2+ and is relaesed when needed

Question 14

catalytic behaviour

Answer 14

cu2+ for zn with acids
mno2 for h2o2 decomposition