Redox and Electrode Potentials

Question 1

Define the term ‘standard electrode potential’

Answer 1

the e.m.f. of a half cell compared with a standard hydrogen half cell

Question 2

What is reduction

Answer 2

the gain of electrons / decrease in oxidation number

Question 3

What is oxidation

Answer 3

the loss of electrons / increase in oxidation number

Question 4

How to write a redox equation from half equations

Answer 4

1. balance the electrons
2. add and cancel electrons
3. cancel any species on both sides