Salt analysis (Qualitative analysis) (4 marks)
Determination of one cation and one anion in a given salt.
Cations- Pb2+, Cu2+, As3+, Al3+, Fe3+, Mn2+, Ni2+, Zn2+, Co2+, Ca2+, Sr2+, Ba2+, Mg2+, NH4
+
Anions – (CO3)
2- , S2- , NO2
- , SO3
2- , SO4
2- , NO3
-
, Cl-
, Br-
, I-
, PO4
3- , C2O4
2- ,CH3COO-
(Note:
Insoluble salts excluded)
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Answer:
we can identify the cation and anion in a given salt by using physical characteristics like color, taste, odor, melting point, solubility product etc.. from colors we observed : potassium dichromate, K2Cr2O7 ( orange) , potassium permanganate,KMnO4(violet), Ferric oxide, Fe3O4 (black), Ferrous sulphate , FeSO4.
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