@@sergei-chemistry I have tested C+Bi2O3 by putting a sparkler into the mix and igniting it but I got no reaction. Bi2O3 works well with Si and B, and to a lesser extent with Fe.
The thermal reductions of metal compounds are usually conducted in a steel crucible closed by his cap for avoiding the interference of atmospheric oxygen.
Would the same thing happen if nitrogen or argon was in the tube? Does oxygen play a role in the reduction of copper oxide? Can copper chloride or sulfate be used instead of cuo?
Looks like the main action here is done by carbon monoxide which is being formed by reaction between CuO and C and moves among solids doing most of the reduction (turning into carbon dioxide on oxidation by CuO and back to CO on reduction on the hot carbon). Presence of inert gases, air or oxygen makes no difference. Copper chloride or sulfate wouldn't work in the test tube, I think (I did try with sulfate - no result).
Carbon- activated carbon powder, standard supply for elementary carbon. You get the same if you grind charcoal. As for the temperature - heat it up in the burner's flame till it starts! Usually several minutes are needed.
![CAMPปลิ้น | รวม Highlight 2024! PART [1/2]](http://i.ytimg.com/vi/6hnvNnvYloU/mqdefault.jpg)
Can you name some other examples of exothermic reactions between carbon and metal oxides?
Lead (II) oxide. Or lead (II) nitrate; on heating it will decompose to oxide and will be reduced by carbon forming metallic lead.
@@sergei-chemistry What about C+Bi2O3/WO3/MoO3/Ag2O?
Ag2O decomposes on simple heating.
Others why not, but this is experimental question. Try and see!
@@sergei-chemistry I have tested C+Bi2O3 by putting a sparkler into the mix and igniting it but I got no reaction. Bi2O3 works well with Si and B, and to a lesser extent with Fe.
The thermal reductions of metal compounds are usually conducted in a steel crucible closed by his cap for avoiding the interference of atmospheric oxygen.
Would the same thing happen if nitrogen or argon was in the tube? Does oxygen play a role in the reduction of copper oxide? Can copper chloride or sulfate be used instead of cuo?
Looks like the main action here is done by carbon monoxide which is being formed by reaction between CuO and C and moves among solids doing most of the reduction (turning into carbon dioxide on oxidation by CuO and back to CO on reduction on the hot carbon). Presence of inert gases, air or oxygen makes no difference.
Copper chloride or sulfate wouldn't work in the test tube, I think (I did try with sulfate - no result).
What type of carbon us used and at what temperature reaction start
Carbon- activated carbon powder, standard supply for elementary carbon. You get the same if you grind charcoal.
As for the temperature - heat it up in the burner's flame till it starts! Usually several minutes are needed.
@@sergei-chemistry thank you 😊