Question

Riya performs two sets of experiments to study the length of the foam formed which are as follows :-
Set 1:-She takes 10ml of distilled water in test tube A and adds 5-6drops of liquid soap in it and shakes the tst tube vigorously
Set 2:-She takes 10ml of distilled water in test tube A and adds 5-6droos of liquid soap with half spoon full of CaSO4in it and shakes...
Write your observation and reason...

Answer 1

In set 1 more foam will be produced but not in set 2 because of the presence of salt of calcium which makes the water hard. And in hard water foam is less produced.