2 (a) A sample of potable water contains impurities - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2021 - Paper 1
Question 2
2 (a) A sample of potable water contains impurities.
Why is this sample of water potable even though it contains impurities?
A the impurities have no smell
B ... show full transcript
Worked Solution & Example Answer:2 (a) A sample of potable water contains impurities - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2021 - Paper 1
Step 1
Why is this sample of water potable even though it contains impurities?
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Answer
The correct answer is C: the impurities are harmless. This indicates that the impurities present do not pose a health risk and thus, the water can still be considered safe for consumption.
Step 2
What is sedimentation?
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Answer
The correct answer is C: the impurities in the waste water settle to the bottom of their container. This process allows for the separation of solid particles from the liquid by gravity, facilitating the subsequent cleaning process.
Step 3
State why the waste water is filtered.
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Answer
Waste water is filtered to remove insoluble substances and solids. This is essential for ensuring that larger debris and contaminants do not remain in the water, which can harm both health and the environment.
Step 4
State the reason for chlorination.
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Answer
Chlorination is carried out to disinfect the water. It helps in killing bacteria and other pathogens, making the water safe for drinking.
