Question

why does soap produce
scum in hard water

Answer 1

Hey mate!!

Here's your answer

When a soap is used in hard water, a solid substance we call Scum forms. This is because charged calcium and magnesium particles (called ions) present in the water react with soap to form an insoluble substance.

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Answer 2

Hey mate!!

Here's your answer

Scum is an insoluble substance that is formed when soaps react with hard water. 

Hard water contains salts of calciumand magnesium. When soap is added to hard water, calcium and magnesium ions present in water displace sodium or potassium ions from the soap molecules forming an insoluble substance called scum.

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