Question

Diya performs two set of experiments to study the length of the foam formed which are as follows:
Set I: She takes 10ml of distilled water in a test tube A and adds 5-6 drops of liquid soap in it and shakes it vigorously.

Set II: She now takes 10ml of distilled water in test tube A and adds 5-6 drops of liquid soap with half spoonful of CaSO4 in it and shakes the test tube.
Write your observations with appropriate reasons.

Answer 1

Hey mate..

Here's your answer..

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We know that soap do not form foam(lather) with hard water.

Thus..when only liquid soap is shook vigorously a good amount
of lather gets formed.

While we add salts like CaSO4 water becomes hard and instead
of foam a white precipitate gets formed during cleansing action.

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HOPE IT HELPS..

@Rêyaañ11

Answer 2

Hey friend!!

Here is ur answer..

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Set I will form more foam because in it, water does not contain any dissolved salts in it.

Set II will form less foam due to the presence of CaSO4 Salt. In this case, a white precipitate formation will occur due to the presence of the Salt.

Due tho addition of CaSO4 in Set II, the distilled water turns into hard water.

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Hope it may help you....

Thank you :) :))