AQA Chemistry exam Questions

answer the questions below on hard water, these will be in test so try and get 5 out of 5.

  • Created by: AD Davies
  • Created on: 28-03-13 20:24
Name an Ion that causes water to be hard
Calcium Carbonate
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Name an advantage of hard water
provides useful calcium ions for the healthy growth of bones and teeth.
2 of 5
Disadvantages of hard water
The deposits of lime scale can build up on the inside of the pipe restricting the flow of water or causing a blockage.
3 of 5
What is hard water?
a water that contains mineral salts
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the differences between scale and scum
Scum is when calcium/magnesium ions in hard water react with soap to form calcium/magnesium stearates and scale forms when hard water is heated and the calcium compounds decompose to form calcium carbonate
5 of 5

Other cards in this set

Card 2

Front

Name an advantage of hard water

Back

provides useful calcium ions for the healthy growth of bones and teeth.

Card 3

Front

Disadvantages of hard water

Back

Preview of the front of card 3

Card 4

Front

What is hard water?

Back

Preview of the front of card 4

Card 5

Front

the differences between scale and scum

Back

Preview of the front of card 5

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