Photo AI

Potable water is water that is suitable for drinking - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2022 - Paper 1

Question icon

Question 2

Potable-water-is-water-that-is-suitable-for-drinking-Edexcel-GCSE Chemistry Combined Science-Question 2-2022-Paper 1.png

Potable water is water that is suitable for drinking. (a) River water can be treated to make it potable. Chlorination, filtration and sedimentation are three of the... show full transcript

Worked Solution & Example Answer:Potable water is water that is suitable for drinking - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2022 - Paper 1

Step 1

Which row of the table shows these three processes in the order in which they are carried out?

96%

114 rated

Answer

The correct row is B: chlorination is carried out first to kill bacteria, followed by filtration to remove smaller particles, and finally sedimentation to allow remaining impurities to settle.

Step 2

State the reason why chlorine is added during the water treatment.

99%

104 rated

Answer

Chlorine is added during water treatment to eliminate harmful microorganisms such as bacteria and viruses, ensuring the water is safe for drinking.

Step 3

Describe how sedimentation is carried out.

96%

101 rated

Answer

Sedimentation is carried out by allowing the water to sit undisturbed in a tank for a certain period. During this time, heavier particles and impurities settle at the bottom, forming sediment. The clear water at the top can then be carefully removed for further treatment.

Join the GCSE students using SimpleStudy...

97% of Students

Report Improved Results

98% of Students

Recommend to friends

100,000+

Students Supported

1 Million+

Questions answered

;