redox

Question 1

oxidation

Answer 1

Oxidation is loss of electrons, or gain of oxygen

Question 2

reduction

Answer 2

Reduction is gain of electrons, or loss of oxygen, or gain of hydrogen

Question 3

oxidation number

Answer 3

The oxidation number/state of an element represents the number of electrons lost/gained by an atom relative to its elemental/atomic state.

Question 4

oxidising agent

Answer 4

An oxidising agent is a species that oxidises other species (by gaining electrons from them)

Question 5

reducing agent

Answer 5

A reducing agent is a species that reduces other species (by losing/giving electrons to them)

Question 6

half equation

Answer 6

A half equation shows the gain or loss of electrons, and is balanced for atoms and charge.

Question 7

ionic redox reaction

Answer 7

An overall ionic redox equation shows the species or ions changing oxidation states.

Question 8

disproportionation reaction

Answer 8

A disproportionation reaction is one in which the same species is both oxidised and reduced.