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When a solution of Na2 Cr2 O7 is treated with amyl alcohol and acidified H2 O2 , the layer of amyl alcohol turns blue. What is the blue colouration?
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다음 화합물의 화학식을 쓰시오. (a) 사이안화 은(silver cyanide) (b) 하이포염소산 칼슘(calcium hypochlorite) (c) 크로뮴산 포타숨(potassium chromate) (d) 산화 갈륨(gallium oxide) (e) 초과산화 포타슘(potassium superoxide) (f) 탄산수소 바륨(barium hydrogen carbonate) | Numerade
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SOLVED:The photographs below show what occurs when a solution of potassium chromate is treated with a few drops of concentrated hydrochloric acid. Some of the bright yellow chromate ion is converted to the orange dichromate ion. 2 CrO4^2-(aq) 2 H3 O^ (aq) ⇌Cr2 O7^2-(aq) 3 H2 O(ℓ) (a) Explain this experimental observation in terms of Le Chatelier's principle. (b) What would you observe if you treated the orange solution with sodium hydroxide? Explain your observation.
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