before analysis of third group basic radicals. Why dil.HNO3 is added followed by heating the solution
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Explanation:
Concentrated nitric acid is added before proceeding to test for group III members. This is to. To oxidise ferrous ion into ferrice ion otherwise Fe2+ is not completely precipitated as Fe(OH)2 , as ferrous hydroxide is more soluble in water than Fe(OH)3.
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