Explain how alum helps to separate suspended impurities from a mixture of sand and water.
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Answer:
Answer: alum is a substance which helps to clean the water. if we keep alum in impure water and kept the container untouched the impure particles become dense and settle down in the bottom of the container. and in this way we are able to purify the water.
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9
Answer:
Explanation:
When alum is added to raw water it reacts with the bicarbonates alkalinities present in water and forms a gelatinous precipitate.
It neutralizes all the suspended impurities of water resulting in their coagulation.
Raw water often holds tiny suspended particles that are very difficult for a filter to catch. Alum causes them to clump together so that they can settle out of the water or be easily trapped by a filter.
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