Oxidation And Reduction

Question 1

Oxidation

Answer 1

Loss of electrons

Question 2

Reduction

Answer 2

Gain of electrons

Question 3

What’s redox

Answer 3

Redox is a movement up or down a scale of oxidation states

Question 4

What are the oxidising and reducing agents

Answer 4

Oxidising agent: electron acceptors

Reducing agent: electron donors

Question 5

What is an oxidation state

Answer 5

Tells you the total number of electrons and element had donated or accepted

Question 6

Half equation rules

Answer 6

In acidic conditions 
1. Balance O by adding H2O
2. Balance H by adding H+
3. Balance charges
eg SO3 2- -> SO4 2-
SO3 2- + H2O -> SO4 2- + 2H+  2e-