Question

Explain the formation of scum when hard water is treated with soap?

Answer 1

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• Scrum is produced from reaction of hard water with soap. Calcium and magnesium present in the hard water form an insoluble precipitate that stick as a white which is also called as scrum.

Answer 2

Answer:

When soap is dissolved in hard water, it reacts with the calcium and magnesium ions that are present there and form calcium and magnesium salt of fatty acids. These salts are not miscible in water at all and form a white layer on the surface of the water called scum

Explanation:

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