ICSE CHEMISTRY CLASS 10
PRACTICAL CHEMISTRY
Test for Anion present in the given salt:
|
Anion
|
Test
|
Observation
|
|
Chloride ion – Cl1-
|
The salt is heated
with Conc. Sulphuric acid
(OR)
When silver
nitrate solution is added
|
A pungent odour
gas which gives dense white fumes with glass rod dipped inn Ammonia solution.
A white ppt. is formed which is soluble in excess
Ammonium hydroxide
|
|
Nitrate ion – NO31-
|
The salt is
heated in a glass test tube
(OR)
To the salt
solution FeSO4 is added and Conc. Sulphuric acid is added drop
wise.
|
Reddish brown
vapours
Brown ring
|
|
Carbonate ion –
CO32-
|
Dil. acid is
added
|
Effervescence
- turns lime water milky – no effect
on acidified KMnO4 and K2Cr2O7.
|
|
Sulphite ion – SO32-
|
Dil. acid is
added
(OR)
Barium chloride
solution is added
|
Colourless gas –
turns lime water milky – decolourizes KMnO4 and turns K2Cr2O7
to clear green solution.
A white ppt.
which is soluble in dilute HCl or HNO3.
|
|
Sulphate ion – SO42-
|
Barium chlorie
solution is added.
|
A white ppt.
which is insoluble in dilute HCl or HNO3.
|
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