Answered

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Cold water of the same source forms lather hardly with soap. Why?
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Sagot :

sashabelle

Answer:

Elaborate on the question

Explanation:
hardness of water is due to calcium and magnesium ions. when soap is added to hard water, calcium and magnesium ions replaces sodium (or potassium) ions in the salt (soap) and gets precipitated hence lather formation is hindered.
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