Further additional Science Chemistry 3

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Why is water from a reservoir filtered?
To remove solids
1 of 17
Why is water from a reservoir treated with chlorine?
To sterilise or disinfect it
2 of 17
Why do water filters contain ion exchange resin?
To remove calcium and magnesium ions
3 of 17
Why do water filters contain particles of carbon?
Improve taste
4 of 17
What evidence did Mendeleev use to decide that the alkali metals should be in the same group?
Similar properties
5 of 17
How are elements in the periodic table arranged in terms of protons?
In order of proton number
6 of 17
How are elements in the periodic table arranged in terms of electrons?
Elements in the same group have the same number of electrons in the outer shell
7 of 17
State two properties of transition elements that make them more useful than alkali metals for making water pipes
Stronger and Less reactive
8 of 17
Give the name of a carbonate in scale
Calcium carbonate
9 of 17
What gas is produced when acids react with scale?
Carbon dioxide
10 of 17
Why does hydrochloric acid react faster than ethanoic acid?
It is a stronger acid which ionises more
11 of 17
Why should hydrochloric acid not be used to dissolve scale in kettles?
It is corrosive
12 of 17
Why is a temperature lower than 450 degrees not used for the Haber process?
Rate of reaction is too slow
13 of 17
How is Ammonia separated from unreacted nitrogen and hydrogen in the Haber process?
Gases cooled and Ammonia liquified
14 of 17
What type of energy is released by hydrogen fuel cells?
Electrical
15 of 17
Why might the building of hydrogen filling stations be encouraged?
Using hydrogen saves petrol and doesn't cause pollution
16 of 17
Describe a test to show that sodium carbonate contains carbonate ions.
Add acid produces carbon dioxide
17 of 17

Other cards in this set

Card 2

Front

Why is water from a reservoir treated with chlorine?

Back

To sterilise or disinfect it

Card 3

Front

Why do water filters contain ion exchange resin?

Back

Preview of the front of card 3

Card 4

Front

Why do water filters contain particles of carbon?

Back

Preview of the front of card 4

Card 5

Front

What evidence did Mendeleev use to decide that the alkali metals should be in the same group?

Back

Preview of the front of card 5
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