Q26

Cation Test

Fe3+   ion

1.Put the solution in the test tube.

2.Add sodium hydroxide solution/

         potassium hexacyanoferrate (II) solution/

        potassium thyocynate solution

3.Observation: brown precipitate formed/

       dark blue precipitate

       Blood red colouration

which confirm the presence of Fe3+ ion.

Anion Test

NO3 -   ion

1.Add dilute Hs SO4 

2.Add FeSO4 solution

3.Add slowly/ drops of concentrated H2SO4

4.Brown ring formed shows the presence of nitrate ion.

Cl -   ion

1.Add HNO3 

2.Add AgNO3 solution/ Pb(NO3 )2 solution

3.White precipitate shows the presence of chloride ion