Vikas TU
Last Activity: 4 Years ago
Let’s check out the reaction of hydrogen peroxide with acidified Potassium dichromate:
K2Cr2O7 + H2SO4 + 4H2O2 ------> K2SO4 + 2CrO5 + 5H2O
The formation of Chromium Pentaoxide leads to the formation of blue colour from orange (as potassium dichromate is orange in colour). Chromium Pentaoxide is blue in colour, so we get a blue colour after the reaction.
In the reaction, Hydrogen peroxide acts as an oxidizing agent, because it itself gets reduced, and its oxidation number changes to -2 from -1.