Redox

Question 1

What is an oxidising agent

Answer 1

Takes electrons from another compound

It becomes reduced

Question 2

What is a reducing agent

Answer 2

Gives electrons to another compound

It becomes oxidised

Question 3

What is the oxidation state of oxygen?

Answer 3

-2 (unless it’s with fluorine in which case fluorine takes priority or within a peroxide)

Question 4

What is the oxidation state of fluorine?

Answer 4

Always -1

Question 5

What is the oxidation state of hydrogen?

Answer 5

+1 (except in metal hydrides where it is -1)

Question 6

What does the oxidation state equate to?

Answer 6

The overall charge on the ion

Question 7

What is the oxidation state on a pure element or eg. H2 and O2?

Answer 7

Zero

Question 8

If the electrons are in the products what does the equation show?

Answer 8

Oxidation

Question 9

If the electrons are in the reactants what does the equation show?

Answer 9

Reduction

Question 10

What is the oxidation number on cl?

Answer 10

-1 unless it’s in a compound with O or F