Analytical ChemistryHard
Question
Nitrate is confirmed by ring test. The brown colour of the ring is due to formation of :
Options
A.ferrous nitrite
B.nitroso ferrous sulphate
C.ferrous nitrate
D.FeSO4. NO2.
Solution
2NO3- + 4H2SO4 + 6Fe2+ → 6Fe3+ + 2NO + 4SO42+ + 4H2O.
Fe2+ + NO + SO42- → [Fe(NO)]2+ SO42-.
Fe2+ + NO + SO42- → [Fe(NO)]2+ SO42-.
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