Month: September 2017

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.	No Effect.	Pb(II), Cu(II) , As(III) absent.
Added dilute hydrochloric acid, concentrated nitric acid and boiled solution. Then cooled it and added solid ammonium hydroxide.	Reddish Brown precipitate formed.	Fe(III) may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Dissolved the precipitate formed with hydrochloric acid. Added potassium sulphocyanide.	Blood red colouration.	Fe (III)  confirmed.

Chemical Equations:-

Ionic equation:-

Fe³⁺_(aq) + 3OH^–_(aq) –> Fe(OH)_{3(s)( Reddish Brown)}

Fe³⁺_(aq) + 3HCl_(l) –> FeCl_3(aq) + 3H₂O_(aq)

FeCl_3(aq) + 6KCNS_(aq) –> K₃[Fe(CNS)₆]_{(Blood Red)} + 3KCl_(aq)

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

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 original solution.	Yellow coloured precipitate formed.	As(III) may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Added dilute hydrochloric acid to above solution.	Yellow coloured precipitate formed.	As(III) confirmed.

Chemical Equations:-

Ionic equation:-

2As³⁺ + 3H₂S_(g) –> As₂S_3(s)(yellow) + 6H⁺

2As₂S_3(s)(yellow)  + 12HCl_(l) –> 4AsCl_3(s)(yellow) + 6H₂S

Chemical Equations:-

Ionic equation:-

NO₃^– + 3Fe²⁺ + 4H⁺ → 3Fe³⁺ + NO + 2H₂O

[Fe(H₂O)₆]²⁺ + NO → [Fe(H₂O)₅(NO)]²⁺

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

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.	Cu(II) ,Pb(II),As(III) may be present.
Added sodium hydroxide to the  original solution.	Blue coloured precipitate formed.	Cu(II) may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Added  ammonium hydroxide to the original solution.	Blue coloured precipitate formed.	Cu(II) confirmed.

Chemical Equations:-

Ionic equation:-

Cu²⁺_(aq) + 2OH^–_(aq)  –> Cu(OH)_2(s)(blue)

Cu(OH)_2(s) + 4NH_3(aq) –> [Cu(NH₃)₄]²⁺_(aq)(blue) + 2OH^–_(aq)

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

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)  –> PbCl_2(l) + 2H⁺

Pb²⁺ + KI_(aq)  –> PbI_2(s)(yellow) + 2K⁺

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

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.	White coloured precipitate is formed.	Lead(II), Ag(I) may be present.
Added precipitate in hot water.	No effect.	Ag(I) may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Added potassium chromate to the original solution.	Brick red coloured precipitate formed.	Ag(I) confirmed.

Chemical Equations:-

Ionic equation:-

Ag⁺ + HCl_(aq)  –> AgCl_(s)(white) + H⁺

2AgCl_(s)(white) + K₂CrO₄ –> Ag₂CrO_4(s)(yellow) + 2KCl_(aq)

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

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.	White coloured precipitate is formed.	Lead(II) may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Added potassium iodide.	Yellow coloured precipitate formed.	Lead(II)  confirmed.

Chemical Equations:-

Ionic equation:-

Pb²⁺_(aq) + HCl_(aq) –> PbCl_2(White)

Pb²⁺_(aq) +2I^–_(aq) –> PbI_2(s)(Yellow)

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

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.	Ammonical smell.	Ammonium may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Added sodium hydroxide solution to the salt.	Ammonical smelling gas evolved.	Ammonium confirmed.

Chemical Equations:-

Ionic equation:-

NH₄⁺_(aq) + OH^–_(aq) –>  NH_3(g) + H₂O_(l)

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

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.	No effect.	Nitrate, Bromide, Chloride,  Acetate, absent. Sulphate or phosphate may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Added soda extract and diluted nitric acid and then added Ammonium Molybdate solution.	A canary yellow precipitate formed.	Phosphate confirmed.

Chemical Equations:-

(NH₄)₂(NO₃)+2Na₂(PO₄) –> 2(NH₄)(PO₄)+2Na₂(NO₃)

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

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.	No effect.	Carbonate, sulphide , sulphite, nitrate absent.
Added concentrated sulphuric acid to given salt.	No effect.	Nitrate, Bromide,  Chloride, Acetate, absent. Sulphate or phosphate may be present.

Confirmatory Test:-

Experiment	Observation	Inference
Added barium chloride solution.	White coloured precipitate is formed.	Sulphate confirmed.

Chemical Equations:-

Ionic equation:-

Ba²⁺_(aq) + SO₄^2-_(aq)   ==> BaSO_4(s)(white)

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