When is added to an acidified solution of Potassium Dichromate () in the presence of ether, a distin — Hydrogen Chemistry Question
Question
When $H_2O_2$ is added to an acidified solution of Potassium Dichromate ($K_2Cr_2O_7$) in the presence of ether, a distinct deep blue color is transiently formed. What is the chemical formula, structural shape, and Chromium oxidation state of this blue complex?
Answer: C
💡 Solution & Explanation
The reaction produces Chromium Peroxide ($CrO_5$), which dissolves in the ether layer yielding a deep blue color. It possesses a unique "butterfly" structure featuring one $Cr=O$ double bond and two peroxy ($-O-O-$) rings. The oxidation state of Chromium remains $+6$.
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