Water GCSE Chemistry AQA (higher)

So this topic is a bit stupid.
water.
really?
but i thought wth and went and did a quiz anyway, it might be in the exam :)
again. Every single sentence in the AQA Revision Guide C3.3
33 questions. 

?
What does water produce when it evaporates?
water vapour
1 of 25
What happens when this cools?
it condenses
2 of 25
do you like the water cycle?
NO WAY. THE WORST THING EVER.
3 of 25
Water that has been in contact with the ground may contain.......
dissolved solids
4 of 25
How is solubility measured?
grams of solute per 100g of solvent at room temp.
5 of 25
What do solubility curves show?
how solubility changes with temperature
6 of 25
The solubility of most solids..........with increasing temperature
increases
7 of 25
The solubility of most gases.............with increasing temperature
decreases
8 of 25
the solubility of gases in water.........as the pressure increases.
increases
9 of 25
What causes hard water?
calcium and magnesium
10 of 25
how does "hardness" get into water?
through rocks
11 of 25
what is carbonated water?
water with dissolved carbon dioxide in
12 of 25
What is "scale"?
an insoluble solid produced when hard water is heated
13 of 25
what is "scum"?
an insoluble solid produced when soap reacts with hard water
14 of 25
What can you add that will remove the reactive ions?
sodium carbonate
15 of 25
what can you add that will react with the reactive ions?
a sodium resin
16 of 25
How could a sodium resin be recharged?
washing it in sodium chloride
17 of 25
what is precipitation in hard water?
when ions that react are removed
18 of 25
What is done to water to make it safe to drink?
sedimentation and filteration
19 of 25
What is chlorine used for?
to kill bacteria
20 of 25
What is the first step in water treatment?
passing it through a special filter
21 of 25
What is the second step in water treatment?
removing large objects
22 of 25
What is the third step in water treatment?
removing sand and soil
23 of 25
What is the fourth step in water treatment?
adding aluminium sulphate and lime to make dirt clump together, making the dirt sink
24 of 25
what is the fifth step in water treatment?
adding chlorine and checking the pH
25 of 25

Other cards in this set

Card 2

Front

What happens when this cools?

Back

it condenses

Card 3

Front

do you like the water cycle?

Back

Preview of the front of card 3

Card 4

Front

Water that has been in contact with the ground may contain.......

Back

Preview of the front of card 4

Card 5

Front

How is solubility measured?

Back

Preview of the front of card 5
View more cards

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