Potable Water (AQA GCSE Chemistry): Flashcards
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15 cards from this deck
Potable water
Potable water
Water that is safe to drink
Example of UK water conservation measure
Example of UK water conservation measure
Hosepipe bans
Fresh water sources (3 types)
Fresh water sources (3 types)
Rivers, lakes, underground rocks
Dissolved substances in fresh water
Dissolved substances in fresh water
Low levels (suitable for treatment)
Filtration removes what?
Filtration removes what?
Insoluble particles
Sterilisation kills what?
Sterilisation kills what?
Harmful microbes
3 sterilisation methods
3 sterilisation methods
Chlorine, ozone, UV light
Desalination
Desalination
Making seawater potable
Main desalination method
Main desalination method
Distillation (boiling seawater)
Desalination challenge
Desalination challenge
Energy-intensive and costly
Alternative desalination method
Alternative desalination method
Membrane systems
What is fluoride?
What is fluoride?
Naturally occurring ion
Fluoridation purpose
Fluoridation purpose
Prevent tooth decay
First fluoridation scheme
First fluoridation scheme
US, 1945
Who decides on UK fluoridation?
Who decides on UK fluoridation?
Individual local authorities