Question

what is scum?????? ​

Answer 1

a dirty or unpleasant substance on the surface of a liquid

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Answer 2

You Should First Know ;-

Hard Water ⇒ The water in which there is carbonate,sulphur,chloride salts of Calcium and Magnesium are present is called the hard water........

✦Hard water doesn't form the lather with soap

✦It is removed by several methods

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When the soap reacts with the hard water then it form the scum.....

It is a white precipitates.....

It is insoluble in water....

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