Obtaining Clean Water

Front

What is the chemical formula for water?

Back

H₂O

Front

What happens to atoms in a chemical reaction?

Back

In a chemical reaction, atoms are rearranged but none are created or destroyed.

Front

Why is water becoming more in demand?

Back

Water is in more demand due to increasing population and industrialisation, and climate change could cause water shortages globally.

Front

What economic benefits come from saving water?

Back

Saving water has economic benefits for domestic, commercial, and industrial consumers as demand outstrips supply and costs increase

Front

What is the simplest method for desalination of sea water?

Back

The simplest method for desalination is distillation, which involves boiling sea water but uses large amounts of costly energy.

Front

What factors affect the viability of desalination as a drinking water source?

Back

The viability of desalination depends on proximity to the sea, availability of cheap energy, and a country's wealth.

Front

What is the boiling point of water?

Back

Water boils at 100°C.

Front

How does distillation separate a mixture of liquids?

Back

Distillation separates liquids based on their different boiling points through boiling and condensation.

Front

What is the name of the method used to get clean drinking water from sea water?

Back

Desalination

Front

What is a disadvantage of using desalination to get drinking water?

Back

It's expensive as it uses lots of energy