Question

What are interfering acid radicals ? Why they interfare afterv2md group analysis

Answer 1

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Interfering radicals are oxalate, tartrate, fluoride, borate and phosphate and they are anionic radicals. They form complex with IIIrd gr group reagent ammonium chloride and ammonium hydroxide.

For example, barium oxalate reacts with HCl and produces oxalic acid