Unit 2: (g) Oxidation

Question 1

What are the three ways that oxidation can be describes as?

Answer 1

1. loss of electrons
2. Gain of electrons
3. loss of hydrogen

Question 2

What will oxidation do to the oxygen to hydrogen ratio?

Answer 2

Increase it.

Question 3

What does reduction do to the oxygen to hydrogen ratio?

Answer 3

Decrease it.

Question 4

What will a primary alcohol oxidise to?

Answer 4

An aldehyde.

Question 5

What will a secondary alcohol oxidise to?

Answer 5

A ketone.

Question 6

What will a tertiary alcohol oxidise to?

Answer 6

Tertiary alcohols will not oxidise.

Question 7

Name 3 oxidising agents?

Answer 7

1. Acidified sodium (or potassium) dichromate
2. Potassium permanganate
3. Copper (II) oxide

Question 8

What are oxidising agents rich in?

Answer 8

Oxygen.

Question 9

What happens to acidified sodium dichromate solution during oxidation?

Answer 9

The orange dichromate ion is reduced to green Cr3+ ions.

Question 10

What happens to acidified potassium permanganate solution during oxidation?

Answer 10

Purple permanganate ions are reduced to colourless Mn3+ ions.

Question 11

What happens to hot copper (II) oxide solution during oxidation?

Answer 11

Black oxide is reduced to reddish copper metal.