Iof distilled wader
ond equal
a student takes about 4ml of distill
in four best tubes marked p q r & s
then dissolves in each test tube and et
amant or one salt in one test tubes
namely sodium sulphate in pardassium,
sulphate in g, calcium sulphate in ra
magnesium sulphate in s arder that he
adds an equal amount of soap solution in
each dest tube
naman die indipen
to which test tubecs he observes a good
amount of lather foam on shaking each!