Question

A substance called ‐-------- is swirled in muddy water to help clean the water

Answer 1

Answer:

lotus is swirled in muddy water

Answer 2

Answer:

A substance called alum is swirled in muddy water to help clean the water

Explanation:

• Alum, also known as aluminum sulfate, is added to water to destabilize the sludge particles suspended in it.This process is called coagulation. Alum  helps purify water with aluminum that coagulates sludge particles.
• Due to the high charge of the aluminum ion $(Al^{+3})$ , it helps the small airborne particles to clump together until they are of such a size that they can sink and  be removed.
• Alum is used to purify raw water.The alum acts as an electrolyte and helps settle suspended matter in the water. This process is called coagulation. .
• Sometimes, Chlorine is a highly effective disinfectant and is added to public water supplies to kill disease-causing pathogens such as bacteria, viruses and protozoa.

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