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 | Obervation | Inference |
| Added dilute sulphuric acid to given salt. | No effect. | Carbonate, sulphide , sulphite, nitrate absent. |
| Added concentrated sulphuric acid to given salt. | Colourless gas with pungent smell evolved. | Chloride may be present. |
Confirmatory Test:-
| Experiment | Observation | Inference |
| Added few potassium dichromate crystals and concentrated sulphuric acid and heated. Passed the vapors through the test tube which contains sodium hydroxide solution. To this yellow solution, added dilute CH3COOH and lead acetate solution. | Yellow coloured precipitate is formed. | Chloride confirmed. |
Chemical Equations:-
K2Cr2O7 + 4NaCl + 6H2SO4 ————→ 2KHSO4 + 4NaHSO3 + 2CrO2Cl2
chromyl chloride
(orange-red vapours)
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CONFIRMATRY TEST FOR CHOLRID RADICAL
It is not with given salts by which cation and anion both are confirmed by this experiment.
Carbonate experiment
Thank You so much!! This is very helpful. : )