Chromate (CrO4)

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
Added dilute sulphuric acid to given salt.	Solution turned yellow.	Chromate may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Added barium chloride solution.	Yellow precipitate formed.	Chromate confirmed.

Chemical Equations:-

Ionic equation:-

CrO₄^2-_(aq) + 2H⁺_(aq) –> Cr₂O₇^2-_(aq)(yellow)

Ba²⁺_(aq) + CrO₄^2-_(aq) –> BaCrO_4(s)(yellow)

You can also get Class XII Practicals on Biology, Physics, Chemistry, and Physical Education.