Topic 4: Extracting Metals and Equilibria

Question 1

What is oxidation in terms of electrons?

Answer 1

Loss of electrons.

Question 2

What is reduction in terms of electrons?

Answer 2

Gain of electrons.

Question 3

How are metals below carbon extracted?

Answer 3

By heating with carbon (reduction).

Question 4

What is bioleaching?

Answer 4

Using bacteria to extract metals from ores.

Question 5

What is phytomining?

Answer 5

Using plants to absorb metal compounds from the soil.

Question 6

What is a life cycle assessment (LCA)?

Answer 6

An analysis of the environmental impact of a product over its lifetime.

Question 7

What is a reversible reaction?

Answer 7

A reaction where the products can react to form the original reactants.

Question 8

What is dynamic equilibrium?

Answer 8

When the forward and reverse reactions happen at the same rate.

Question 9

What happens if you increase temperature in a reversible reaction?

Answer 9

Equilibrium shifts to the endothermic side.

Question 10

What does Le Chatelier’s Principle state?

Answer 10

If conditions change, the system shifts to oppose the change.