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CGP EDU Academic Team
Published on: August 13, 2026
Why is the original solution boiled with conc. HNO 3 in group ΙΙΙ ?
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Fe 2+ salt are oxidised to Fe 3+ salt by boiling with conc. HNO 3 , before adding NH 4 Cl and NH 4 OH, otherwise Fe 2+ would not be precipitated in group ΙΙΙ .
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