A sample of potable water contains impurities - Edexcel - GCSE Chemistry - Question 3 - 2021 - Paper 1
Question 3
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 the impu... show full transcript
Worked Solution & Example Answer:A sample of potable water contains impurities - Edexcel - GCSE Chemistry - Question 3 - 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 B: the impurities are colourless. This means that even though impurities may be present in the water, their color does not affect its potability.
Step 2
What is sedimentation?
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Answer
The process of sedimentation is described by option C: the impurities in the waste water settle to the bottom of their container. This occurs due to gravity, allowing heavier particles to settle while cleaner water can be separated.
Step 3
State why the waste water is filtered.
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Waste water is filtered to remove remaining solid impurities and contaminants from the water, ensuring that it is clean and safe for further treatment before being made into drinking water.
Step 4
State the reason for chlorination.
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Chlorination is performed to disinfect the water by killing harmful bacteria and pathogens. This step is crucial in ensuring the water is safe to drink and free from disease-causing microorganisms.
