When acidified dichromate is treated with hydrogen peroxide () in an organic solvent, a vibrant blue — d and f Block Elements Chemistry Question
Question
When acidified dichromate is treated with hydrogen peroxide ($H_2O_2$) in an organic solvent, a vibrant blue compound with a "butterfly" structure is formed. What is the chemical formula and oxidation state of Chromium in this complex?
Answer: B
💡 Solution & Explanation
The blue compound is Chromium(VI) peroxide ($CrO_5$). Its butterfly structure contains one oxo oxygen ($-2$) and four peroxy oxygens ($-1$ each). Thus, $x - 2 - 4 = 0$, giving an oxidation state of exactly $+6$.
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