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If you burn copper(II) acteate(CuC4H6O4), because I was making copper acetate and when i was drying it i left it too long and it burned and i redissolved it in water and it was a dark green solution with a reddish orange precipitate in the bottom. How can i dry solutions so they don't burn, besides watching it closely? 

When i made the copper acetate the solution was saphire blue then when it was dried it was a dark green then in solution of water it is dark green, i have gotten blue crystals before so i think it is the way i am drying it(under a heat lamp). 

I have many more questions(Why can't i get my iron acetate solution to turn red?) that i have pondered but they can wait for now.

How did you make the cupric acetate? Cupric acetate (verdigris) is supposed to form green solutions. Cupric subacetate or basic cupric acetate can be blue if the ratio of cupric acetate to cupric hydroxide to water is 1:1:5. Drying this removes the water (and the nice blue color) producing copper acetate (green) and copper hydroxide (greenish blue) or copper oxide (brownish black) with further heating.

asked Jan 25, 2019 in Chemical Engineering by weishida
recategorized Jan 31, 2019 by jiya | 127 views

1 Answer

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Study on thermal decomposition of copper(II) acetate monohydrate in air
Zhenkun Lin1, Donglin Han2 and Shufen Li2
Phone: +86-577-86699570; Fax: +86-577-86699122
Journal of Thermal Analysis and Calorimetry
Vol. 107: , Issue. 2, : Pages. 471-475
(Issue publication date: February 2012)

The thermal decomposition of copper(II) acetate monohydrate (CuAc2·H2O) under 500 °C in air was studied by TG/DTG, DTA, in situ FTIR and XRD experiments. The experimental results showed that the thermal decomposition of CuAc2·H2O under 500 °C in air included three main steps. CuAc2·H2O was dehydrated under 168 °C; CuAc2 decomposed to initial solid products and volatile products at 168–302 °C; the initial solid products Cu and Cu2O were oxidized to CuO in air at 302–500 °C. 

The copper acetate peroxides were found to form between 100 and 150 °C, and the dehydration of these peroxides resulted in the presence of CuAc2·H2O above 168 °C. The initial solid products were found to be the admixture of Cu, Cu2O, and CuO, not simply the single Cu2O as reported before. 

answered Feb 2, 2019 by Soutrik 1 flag
edited Feb 2, 2019 by Soutrik
Question is on Copper Acetate !
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