ICSE CHEMISTRY CLASS 10
PRACTICAL CHEMISTRY
Test for cations present in the given salt:
|
Cation
|
Ammonium
Hydroxide
|
Sodium
hydroxide
|
||
|
In small amount
|
In excess
|
In small amount
|
In excess
|
|
|
Caclium ion – Ca2+
|
No ppt.
|
No ppt.
|
White ppt.
|
White ppt.
(insoluble)
|
|
Zinc ion - Zn2+
|
Gelatinous white
ppt.
|
ppt. Soluble/
disappears
|
Gelatinous white
ppt.
|
ppt. Soluble/
disappears
|
|
Copper / Cupric
ion – Cu2+
|
Pale blue ppt.
|
Inky blue
solution
|
Pale blue ppt.
|
Insoluble
|
|
Lead ion – Pb2+
|
White ppt.
|
Insoluble
|
White ppt.
|
Soluble
|
|
Ferrous ion – Fe2+
|
Dirty green ppt.
|
Insoluble
|
Dirty green ppt.
|
Insoluble
|
|
Ferric ion – Fe3+
|
Reddish brown
ppt.
|
Insoluble
|
Reddish brown
ppt.
|
Insoluble
|
Test for
Ammonium ion (NH41+)– Ammonium ion gives dark brown ppt.
with Nessler’s reagent.
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