Question

deep green precipitate of Cr(OH)3 givesa yellow sol on addition of H2O2​

Answer 1

Answer:

An excess of sodium hydroxide solution is added to a solution of the hexaaquachromium(III) ions to produce a solution of green hexahydroxochromate(III) ions. This is then oxidised by warming it with hydrogen peroxide solution. You eventually get a bright yellow solution containing chromate(VI) ions.

Answer 2

Answer:

CO(O

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