Grade 12th pass10 grade science
Explain the formation of scum when hard water is treated with soap.
Explain the formation of scum when hard water is treated with soap.
1 Answer
Pawan Prajapati
The precipitate form of scum is formed when soap is used for washing clothes. With hard water, a large amount of soap is wasted in reacting with the calcium and magnesium ions of hard water to form an insoluble precipitate. The precipitate form formed by the action of hard water on soap, sticks to the clothes being washed and interferes with the cleaning ability of the additional soap. This makes the cleaning of clothes difficult.
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