Science, asked by alvinotta, 1 year ago

why do soap not form lather in hard water

Answers

Answered by riooo
4

Because it contains lot of salts and minerals in it

alvinotta: plz explain brief
Answered by bharatjindal
11
soap is sodium or potassium salt of fatty acid. it is made up when alkali reacts with fatty acids.

hardness of water is due to calcium and magnesium ions.

sodium salts dissolve in water and hence lather is formed

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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