Chemistry · Preparation, properties and uses of K2Cr2O7 and KMnO4
To an acidified dichromate solution, a pinch of and ether is added and shaken.Wh
To an acidified dichromate solution, a pinch of \( N a_{2} O_{2} \) and ether is added and shaken.What is observed?
- A. Deep violet colour
- B. Red colour changing to green
- C. AgF is insoluble, others are soluble
- D. All are insoluble
Step-by-step solution
Na2O2 reacts with acid to produce H2O2, which reacts with dichromate (Cr2O7^2-) in acidic medium to form chromium peroxide (CrO5), a deep violet compound that is extracted into ether, giving a deep violet color in the ether layer.
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