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 th... 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?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is C: the impurities are harmless. This indicates that while the water contains impurities, they do not pose any health risks, making the water safe for consumption.
Step 2
What is sedimentation?
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is C: the impurities in the waste water settle to the bottom of their container. This process allows for the removal of larger suspended particles, which settle out over time due to gravity.
Step 3
State why the waste water is filtered.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The waste water is filtered to remove insoluble substances and solid materials. This process is essential for ensuring the water is clean and safe for further treatment or discharge.
Step 4
State the reason for chlorination.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Chlorination is used to disinfect the water, removing bacteria and other pathogens that could cause illness. It plays a crucial role in making the water safe for human consumption.
