TM

Question 1

What is the transition metal ion compound and colour formed when excess HCL is added to Cu2+ (aq)

Answer 1

CuCl4 ^2-
Yellow

Question 2

What is formed in the disproportionation of Cu+?

Answer 2

Brown solid Cu
Blue solution (CuSO4)

Question 3

What is formed when CoCl2-6H2O plus water and excess HCl?

Answer 3

CoCl4^2-
Blue

Question 4

What is the colour change when MnO4- is titrated?

Answer 4

Purple to pale pink (Mn2+)

Question 5

What is the colour change when Fe3+ is titrated?

Answer 5

orange brown to brown
Fe3+ goes to I2

Question 6

Define what a Ligand is?

Answer 6

A molecule or an ion with a lone electron pair that is able to form dative coordinate bond to the central metal ion by donation of this electron pair.

Question 7

Define monodenate ligand

Answer 7

Ligands each form one coordinate bond
E.g. H2O, Cl-, NH3

Question 8

Define bidentate ligand

Answer 8

Each ligand form two coordinate bonds
E.g. NH2CH2CH2NH2

Question 9

Define monodenate ligand

Answer 9

Ligands each form one coordinate bond
E.g. H2O, Cl-, NH3

Question 10

Define coordination number

Answer 10

Coordination number of transition metal complex is the total number of coordinate bonds b=formed with the central metal ion.

Question 11

What are octahedral complexes?

Answer 11

TM with H2O and NH3 l;Uganda commonly form octahedral complexes with a bond angle of 90 degrees
Formed when there is a six fold coordination

Question 12

What are tetrahedral complexes?

Answer 12

They form with larger ligands such as Cl- forming tetrahedral complexes with a bond angle of 109.5 degrees.
These can show optical isomerism.

Question 13

What are square planar complexes?

Answer 13

Platinum and nickel form a square planar shape. This consists of coordinate bounds with a bond angle of 90 degrees.

Question 14

What is the cancer therapy drug and what is the displayed structure?

Answer 14

Cisplatin
Square planar complex of platinum. It has both chlorine atoms on the same side.

Question 15

Write the equation of the ligan substitution reaction between copper and aqua ion and chloride ions

Answer 15

Cu2+ + 4Cl- = (CuCl4)2- + 6H2O

Question 16

What is harm and describe the process of the ligand substitution reaction it undergoes?

Answer 16

A component of haemoglobin and an example of multidentate ligands
Consists of central Fe2+ ion.
Has overall octahedral structure

Ligand substitution reaction occurs when the oxygen usually bonded to haem is replaced with carbon monoxide. The carbon monoxide binds more strongly than oxygen so cannot be removed. therefore, is toxic to humans as it prevents oxygen from being transported around the body.