AIM: – To identify the given inorganic compound for its acidic and basic radical.
APPARATUS:- Chemical Reagent, Test Tube, Test Tube holder, Spatula
PROCEDURE:-
Preliminary Test:-
| Experiment | Observation | Inference |
| Smelled the salt. | No Ammonical smell. | Ammonium absent. |
| Added dilute hydrochloric acid to the original solution. | No Effect. | Lead(II)may be present. |
| Added hydrogen disulphide, hydrochloric acid to the original solution. | Black coloured precipitate formed. | Lead(II)may be present. |
Confirmatory Test:-
| Experiment | Observation | Inference |
| Added potassium iodide to the original solution. | Yellow coloured precipitate formed. | Lead(II) confirmed. |
Chemical Equations:-
Ionic equation:-
Pb2+ + HCl(aq) –> PbCl2(l) + 2H+
Pb2+ + KI(aq) –> PbI2(s)(yellow) + 2K+
You can also get Class XII Practicals on Biology, Physics, Chemistry, and Physical Education.
In Ionic Equation above PbCl2 is formed (when HCL is added) which means white ppt and group 1 cation,
But in Preliminary test above (no effect) is written in observation while adding Dil HCL.
Reply…….
I had same question
Their is written their no effect due to formation of either cu2 or pb