Redox, Rusting And Iron

Question 1

What is oxidation?

Answer 1

The gain of oxygen, loss of hydrogen and loss of electrons.

Question 2

What is reduction?

Answer 2

The loss of oxygen, gain of hydrogen and gain of electrons.

Question 3

What is a redox reaction?

Answer 3

One in which oxidation and reduction occur at the same time.

Question 4

What is the chemical name for rust?

Answer 4

Hydrated iron(III) oxide

Question 5

What is the appearance of rust like?

Answer 5

A brown, flakey solid

Question 6

How is rust formed?

Answer 6

When iron reacts with oxygen and water

Question 7

Give some methods of prevention of rust:

Answer 7

Painting
Oiling
Greasing
Galvanising

Question 8

What is sacrificial protection?

Answer 8

Placing a more reactive metal the iron over the iron so it will react first.

Question 9

Name the solids put into the blast furnace:

Answer 9

Coke
Limestone
Hematite

Question 10

Name the reducing agent in the blast furnace and give the equations for how it is formed:

Answer 10

Carbon monoxide,
C + 02 — C02
C02 + C — 2C0