Question

what happened when K2 cr2 O7 solution acidified react with H2 O2​

Answer 1

Answer:

A blue colour is obtained when hydrogen peroxide is added to dichromate or any other Cr(VI) compound. The deep blue colour is due to formation of CrO(O2)2. The blue colour fades away and compound decomposes readily into Cr3+ and O2(g) in aqueous solution. However the peroxo compound can be extracted intoi oxygenated organic solvent e.g, diethyl ether, ethylacetate or 1-pentanol etc. where it remains stable. It is more stable below 273 K. On addition of pyridine to ethereal solution, it forms complex Py.Cro5.

blue colour is obtained when hydrogen peroxide is added to dichromate or any other Cr(VI) compound. The deep blue colour is due to formation of CrO(O2)2. The blue colour fades away and compound decomposes readily into Cr3+ and O2(g) in aqueous solution. However the peroxo compound can be extracted intoi oxygenated organic solvent e.g, diethyl ether, ethylacetate or 1-pentanol etc. where it remains stable. It is more stable below 273 K. On addition of pyridine to ethereal solution, it forms complex Py.Cro5.K2Cr2O7 + H2SO4 + 4 H2O2 = 2 CrO5 + K2SO4 + 5 H2O

Explanation:

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