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
A) the impurities have no smell
B) t... 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
What is the correct reason for potable water despite impurities?
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Answer
The correct answer is C) the impurities are harmless. This indicates that the presence of impurities does not pose a health risk to those consuming the water, making it safe for drinking.
Step 2
What is sedimentation?
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Answer
Sedimentation is a process where the impurities in the waste water settle to the bottom of their container. This allows for the separation of solid impurities from the liquid.
Step 3
State why the waste water is filtered.
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Answer
The waste water is filtered to remove insoluble substances and solids. This process helps to eliminate larger particles and contaminants from the water, contributing to its clarity and safety.
Step 4
State the reason for chlorination.
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Answer
Chlorination is used to disinfect water, ensuring that harmful bacteria and pathogens are killed. This process is crucial for making the water safe for human consumption.
