Transition Metals

Question 1

Complex ion

Answer 1

Central atom surrounded by ligands

Question 2

Ligand

Answer 2

Molecule or ion forms a co ordinate bond with a transition metal by donating a pair of electrons

Question 3

Monodentate ligand

Answer 3

Molecules or ions that donate one electron pair to the central metal ion to form one co ordinate bond

Question 4

In terms of bonding explain the meaning of the term complex

Answer 4

Central atom with ligands surrounding it

Logan’s form coordinate bonds to the metal ion

Question 5

How can an ion act as a ligand

Question 6

Write an equation for the overall reaction in the Contact process

Answer 6

SO2 + 1/2 O2 —> SO3 ALL GAS

Question 7

Explain meaning of heterogenous as applied to a catalyst

Answer 7

Catalyst in the same phase

Question 8

Write two equations to illustrate vanadium (V) oxide acts as a catalyst in the contact process

Answer 8

V2O5 + SO2 —-> V2SO4 + SO3

V2SO4 + 1/2O2 —-> V2O5

Question 9

What’s done to a heterogenous catalyst like vanadium oxide to maximise its efficiency

Answer 9

Surface area is increased by using powder

Question 10

Give the meaning of the term multidenate

Answer 10

Firms more than 2 coordinate bonds

Question 11

Explain why the free energy change is negative for a reaction

Answer 11

From less particles to more particles so ther3 a positive entropy change
Delta H is 0
So Gibbs free energy change must be negative

Question 12

B12 contains CN- ions why isn’t it toxoc

Answer 12

Cynagide is strongly bonded to Co

Question 13

State one risk associated with the use of cisplatin as an anti cancer drug

Answer 13

Side effects like hair loss

May attach to DNA in normal cells