Transition Metals

Question 1

Chemical properties of TM?

Answer 1

• variable oxidation states in compounds
• form colored compounds and ions
• often show catalytic activity (act as catalyst)
• forms stable complexes

Question 2

Acidity of oxidation states (TM)

Answer 2

Oxides with low ON tend to be basic (ionic) MnO
Oxides with high ON tend to be acidic (covalent) Mn2O7

Question 3

Colours of Cu compounds?
1. Cu2+

Answer 3

1. Cu2+: blue
2. [Cu(NH3)4(H2O)2]2+ : dark blue
3. [CuCl4]2- : yellow
4. Cu2O: brick red solid
5. Cu(OH)2: blue (solid)

Question 4

Catalyst pathway?

Answer 4

1. Adsorption of rxts by catalyst surface
2. weak imf form btwn rxt and catalyst
3. all rxts brough closer & rxn at surface occurs
4. deadsorption of products to regen catalyst