1
Q
What is water that is safe to drink called?
A
Potable water
2
Q
Why is potable water not pure?
A
It may contain dissolved substances
3
Q
In the UK, what does rain water provide?
A
Ground water
4
Q
What happens to ground water?
A
It is settles then filtered and sterilised to produce potable water
5
Q
What are 3 sterilising agents?
A
Chlorine, ozone or UV light
6
Q
What do sterilising agents do?
A
Kill microbes
7
Q
What happens if supplies of fresh water are limited?
A
Salty water is desalinated
8
Q
How can desalination be done?
A
By distillation or reverse osmosis which both use large amounts of energy
9
Q
What pH and boiling point does pure water have?
A
A pH of 7 and as boiling point of 100℃
Chemistry Paper 2
flashcards
Decks in class (37)
# Cards
-
Rates of Reaction5
-
Collision theory and activation energy4
-
Catalysts4
-
Reversible reactions3
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Energy changes reversible reactions2
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Equilibrium2
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Effect of changing conditions on equilibrium9
-
Crude oil, hydrocarbons and alkanes10
-
Fractional Distillation6
-
Cracking and the alkenes17
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Alcohols8
-
Carboxylic acids5
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Addition polymerisation4
-
Condensation polymerisation5
-
Amino acids4
-
DNA6
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Purity, formulations and chromotography9
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Identifying gases8
-
Identification of ions by chemical and spectroscopic means19
-
Instrumental methods; flame emission spectroscopy6
-
Gases in the atmosphere4
-
The early atmosphere of the earth9
-
Greenhouse gases8
-
Global climate change2
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Carbon footprint6
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Atmospheric pollutants from fuels11
-
Earth's resources4
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Potable water9
-
Waste water5
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Alternative methods of extracting metals5
-
Life cycle assessment6
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Reducing use of resources3
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Corrosion and its prevention8
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Alloys as useful materials9
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Ceramics, polymers and compounds10
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The Haber process9
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Fertilisers8
