Redox

Question 1

Oxidation Numbers- Atom in elemental state

Answer 1

0

Question 2

Oxidation Numbers- Single atom ions

Answer 2

Charge of atom

i.e. CdCl2 (Cd= +2, Cl= -1)

Question 3

Oxidation Numbers- Fl

Answer 3

Always 0

Question 4

Oxidation Numbers- H

Answer 4

Usually +1

Except in metal hydride (-1)

Question 5

Oxidation Numbers- O

Answer 5

Usually -2

In peroxide= +1
When bound to F= +1

Question 6

Oxidation Numbers- Alkali metal

Answer 6

+1

Question 7

Oxidation Numbers- Alkaline Earth metal

Answer 7

+2

Question 8

Galvanic Cell

Answer 8

Spontaneous
Anode (-)----> Cathode (+)
Chemical to electrical energy
Electrons come from oxidized element at anode
Ecell>0

Question 9

Electrolytic Cell

Answer 9

Non-spontaneous
Anode (+)----> Cathode (-)
Electrical to chemical energy
Needs external power source
Electrons come from external source
Ecell<0