Question

sunil took two water samples in test tube A and B he added soap solution to both he observed soap lather in A and no lather in B what can you conclude from this

Answer 1

We can conclude that test tube A contains soft water and test tube B contains B contains hard water

This is because soft water doesn’t affect the cleansing action of the soap but whereas in hard water, the Ca and Mg salts will precipitate the soap thereby reducing the cleansing action and foaming capacity


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