4.3 : Redox

Question 1

What are the rules for oxidation numbers?

Answer 1

Oxidation number for elements : 0
Oxidation number of an ion : charge
Oxidation number of a poly atomic number = charge
Oxidation number of a compound : 0

Question 2

What do Roman numerals represent in naming ?

Answer 2

They show the oxidation state ( number ) of the element , without a sign.

Question 3

Explaining oxidation and reduction in terms of oxygen

Answer 3

Oxidation is the addition of oxygen.

Reduction is the removal of oxygen.

Question 4

Explain oxidation and reduction in terms of electrons

Answer 4

Reduction is the gain of electrons.

Oxidation is the loss of electrons.

Question 5

Explain oxidation and reduction in terms of oxidation number

Answer 5

Reduction is a decrease in oxidation number.

Oxidation is an increase in oxidation number.