Water

The chemical compound of water is

• HO
• H₂O
• H₃O
• HO₂

Water is a universal solvent

• True
• False

What does chlorination do to the water?

• Removes microorganisms
• Cleans the water
• Makes the water taste nice
• Removes twigs and sediment

Boiling temperature of water is

• 10°C

• 110°C

• 100°C

• 0°C

What process will separate dissolved solids out of water leaving you with pure water?

• chromatography

• sterilisation

• distillation

• filtration

River water is filtered then sterilised to make drinking water. Why is it filtered?

• kills bacteria
• removes solids
• removes dissolved salts
• adds chlorine
• removes germs

How do we test for water?

• Copper (III) sulfate

• Copper (II) sulfate

• Cobalt (III) chloride

• Cobalt (II) chloride

How will cobalt chloride appear in the presence of water?

• Yellow

• Pink

• Blue

• Green

How will copper sulfate appear in the presence of water?

• Yellow

• Pink

• Blue

• Green

What are the two methods for water treatment?

• Evaporation

• Filtration

• Salination

• Chlorination