In a given unknown coloured inorganic salt 'B' identify cotionic amd anionic radical on the basis of dry and wet test
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HII....RAJDEEP HERE!
Dry test means testing a radical using its physical properties like colour, density etc. and wet test means testing a radical by adding suitable reagent.
Add little sodium hydroxide on the given salt. If the colour of the precipitate is:
Pale blue: Salt contains Copper ions
Dirty green: Salt contains Iron(II) ions
Yellowish brown: Salt contains Iron(III) ions.
Gelatinous white: Zinc ion
Curdy white: Calcium ion
Milky white: Magnesium ion
Chalky white: Lead ion.
Now for wet test,
1) Add silver nitrate solution. If a white precipitate is obtained (of silver chloride) which dissolves in ammonia solution, the salt contains chloride radical.
2) Add Barium chloride solution. If a white precipitate is formed which
Dissolves in mineral acids, the salt contains sulphite ions.
Does not dissolve in mineral acids, the salt contains sulphate ions.
3) Add freshly prepared ferrous sulphate solution and concentrated sulphuric acid. If a brown ring appears, the salt contains nitrate ions.
4) Add Nessler's reagent. If the salt turns the colour of Nessler's reagent brown, ammonium ion is present.
Hope this helps...for more answers, please follow!
Dry test means testing a radical using its physical properties like colour, density etc. and wet test means testing a radical by adding suitable reagent.
Add little sodium hydroxide on the given salt. If the colour of the precipitate is:
Pale blue: Salt contains Copper ions
Dirty green: Salt contains Iron(II) ions
Yellowish brown: Salt contains Iron(III) ions.
Gelatinous white: Zinc ion
Curdy white: Calcium ion
Milky white: Magnesium ion
Chalky white: Lead ion.
Now for wet test,
1) Add silver nitrate solution. If a white precipitate is obtained (of silver chloride) which dissolves in ammonia solution, the salt contains chloride radical.
2) Add Barium chloride solution. If a white precipitate is formed which
Dissolves in mineral acids, the salt contains sulphite ions.
Does not dissolve in mineral acids, the salt contains sulphate ions.
3) Add freshly prepared ferrous sulphate solution and concentrated sulphuric acid. If a brown ring appears, the salt contains nitrate ions.
4) Add Nessler's reagent. If the salt turns the colour of Nessler's reagent brown, ammonium ion is present.
Hope this helps...for more answers, please follow!
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