2.10.1 Redox

Question 1

What happens in terms of electrons in oxidation?

Answer 1

Oxidation is the process of electron gain

Question 2

What happens in terms of electrons in reduction?

Answer 2

Reduction is the process of electron gain

Question 3

What happens in terms of electrons to oxidising agents?

Answer 3

Oxidation agents are themselves reduced, so they gain electrons

Question 4

What happens to reducing agents in terms of electrons?

Answer 4

Reducing agents are themselves oxidised, so they lost electrons

Question 5

What do half equations show?

Answer 5

Half equations show the gain or loss of electrons by one chemical. They either show reduction OR oxidation.

Question 6

What are spectator ions?

Answer 6

Spectator ions are ions that don’t take part in the reaction

Question 7

What is the aim when combining half equations?

Answer 7

The aim is to make sure that the same number of electrons that are donated by one half equation are accepted by the other

Question 8

What is the step-by-step process for combining half equations?

Answer 8

1- write out the two half equations
2- note the number of electrons in each equation
3- multiply out the reactants and products
4- write all the reactants together, and all the products together

Question 9

What two words make up ‘redox’?

Answer 9

Reduction and oxidation