Question

Riya perform two sets of experiment to study the length of foam formed which are as followed Set1 she takes 10ml of distilled water in test tube a and adds 5-6 drops of liquid soap in it and shakes the test tube vigorously Set2 she 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 observation and reason

Answer 1

Set 1 : will have more length of foam because it consist of soft water
Set 2 : will form less foam because it consist of hard water due to the presence of CaSO4

Answer 2

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