Topic 3 - Redox I

Question 1

Oxidation number

Answer 1

The charge that would exist on an individual atom if the bonding were completely ionic. Gives the oxidation state of an element or ionic substance.

Question 2

Oxidation numbers in charged compounds

Answer 2

Hydrogen +1
Oxygen -2
Halogens -1
Group I metals +1
Group II metals +2

Question 3

Oxidation number rules exceptions

Answer 3

Oxygen has an oxidation number of -1 in peroxides

Hydrogen has an oxidation number of -1 in metal hydrides

Question 4

Disproportionation reaction

Answer 4

when an element in a single species is being simultaneously oxidised and reduced