Identify the cationic and onionic radical in given unknown salt performing dry and wet test for cationic Radical and onionic radical OR IN a given unknown caloured inorganic Salt B identify cationic and anionic radical on the basis of the basic of dry and wet test
Answers
Dry test means testing a substance by its physical properties like colour, density, etc.
Wet test means testing a substance by adding suitable reagents.
Add little Sodium hydroxide(NaOH) solution into the given salt.
If the salt contains the following cations, the following coloured precipitates are obtained:
Copper: Pale blue
Ferrous: Dirty green
Ferric: Yellowish brown
Zinc: Gelatinous white
Lead: Chalky white
Calcium: Curdy white
Magnesium: Milky white
Aluminium: Shiny white
On adding excess sodium hydroxide solution, the white precipitates of zinc, lead and aluminium dissolves; others do not.
Now to test for anions, add silver nitrate solution on the given salt.
If a white precipitate (of AgCl) is obtained which dissolves in excess ammonia solution, then Chloride ion is present.
Add Barium Chloride solution. If a white precipitate (of BaSO4) is obtained, which is insoluble in mineral acids, then the salt contains Sulphate radical.
Add freshly prepared ferrous sulphate solution with conc. H2SO4 into the given salt solution. If a brown ring (of Nitroso Ferrous Sulphate) appears, the salt contains Nitrate ions. Thanks....
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Answer:
In order to conduct this test, a small amount of salt is heated in a dry test tube. Carefully executing and recording the observations can yield quite valuable information. Some salts undergo decomposition when heated, releasing gases as a result.
Identifying anion types (Acid Radicals)
On the basis of the preliminary tests, the radicals are initially identified. One of the older preliminary experiments was the dry heating test, which may provide some crucial information regarding the acid radical present.
Explanation:
A substance is tested using its physical characteristics, such as color, density, etc., in a dry test.
A substance is tested using appropriate reagents in a wet test.
Add some sodium hydroxide (NaOH) solution to the salt that has been provided.
The cations listed below produce the colored precipitates listed below when added to salt:
Copper: Pale blue
Ferrous: Dirty green
Ferric: Yellowish brown
Zinc: Gelatinous white
Lead: Chalky white
Calcium: Curdy white
Magnesium: Milky white
Aluminum: Shiny white
The white precipitates of zinc, lead, and aluminum dissolve when too much sodium hydroxide solution is added; other precipitates do not.
Add silver nitrate solution to the provided salt to conduct an anion test.
Chloride ions are present if a white precipitate (of ) forms and dissolves in an excess ammonia solution.
Add a solution of barium chloride. The salt contains Sulphate radical if a white precipitate of is produced and it is insoluble in mineral acids.
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