Identify the following cations using NaOH solution and NH4OH solution.
Fe2+
Fe3+
Cu2+
Ca2+
zn 2+
Pb2+
NH4+
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Step - I : Preliminary Test with Dilute Sulphuric Acid
In this test the action of dilute sulphuric acid (procedure is given
below) on the salt is noted at room temperature and on warming.
Carbonate ( 2– CO3
), sulphide (S2–), sulphite ( 2–3 SO ), nitrite ( – NO2
)
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