30 replies to this topic

[Dan]

i was looking on the net today and came across a website that says u can make Copper (II) oxide using sodium hydroxide and Copper sulfate. can any one tell me if it is safe to do and if so how to? thx

[Stuart]

Why do you want to make it anyway, it is easier to just buy it? If you do want to do it anyway...

It should be possible. The same method can be used to make Iron Oxide. Dissolve the Copper Sulphate and Sodium Hydroxide in a minimal amount of water each. Now pour one into the other. You should instantly get a precipitate. Stir it for a few minutes and leave for half an hour. You can then either slowly pour off the excess liquid and then add some more, clean water or leave it. Gently heat the mixture in boiling water and it should slowly change colour and change into Copper Oxide. Once done, leave it over night and then decant and wash you Copper Oxide.

No safety needs to be taken into account other than the obvious, don't breath in or eat anything, wash hands if anything gets on them etc.

Edited by Stuart, 07 July 2004 - 06:25 AM.

[Dan]

cool thanks stuart. i just find it to be a challenge and sort of fun to make ur own things rather than buy them which takes most of the fun out of it.

btw are Copper Sulfate Pentahydrate (CuSO) and copper sulfate the same thing and if not what is the difference?

here is a link of the MSDS root killer k-77

Edited by Dan, 07 July 2004 - 01:49 PM.

[Stuart]

They are the same chemical except in the Pentrahydrate, there are water molecules trapped inside the crystal lattice. It shouldn't make any difference to the reaction but if you want to use Anhydrous Copper Sulphate (no water), just put your Hydrate in the oven for an hour or so.

[Dan]

cool thx stuart i will let u know if it works.

[Dan]

ok stuart i got everything mixed. when i mixed them together they made a blue solid color and i waited about 30-45 minutes. it had turned a black color. then i boiled it and it didnt change color. isnt blaack what i a looking for? cant i just run it thru a coffee filter to take out he water? what is the stuff mixed with the water after the reaction?
thx for the help
Dan

Edited by Dan, 09 July 2004 - 01:09 PM.

[Stuart]

Sounds like you might have done it. Copper (II) Oxide is black. The blue solid you first saw would be the Copper Hydroxide formed. It sounds like you don't have to boil it though so yes, just run it through a coffee filter and omit the boiling bit.

Well done

Stuart

[Dan]

COOL thx stuart. i will boil one and filter the other and let u know which one is better.

[completebeginner]

would it be possible to make copper oxide using copper powder and hydrogen peroxide?

[Frozentech]

would it be possible to make copper oxide using copper powder and hydrogen peroxide?

I do not think so. I am curious as to whether Dan was able to use his precipitated Copper II Oxide. When looking for info in my library, I only found references such as Weingart, that stated "only the fused (Copper Oxide) form is useful, the brownish-black, light precipitated oxide is useless."

[Mumbles]

I've used precipitated copper oxide before. It seemed to work alright. They burn fine and a nice blue on the ground. I didn't prime them well enough in the air.

[JamesH]

You can convert copper (II) carbonate to copper (II) oxide by heating it. Have you tried that approach?

[fishy1]

No safety needs to be taken into account other than the obvious, don't breath in or eat anything, wash hands if anything gets on them etc.

and don't do it in an aluminium pot.

[jerke]

and don't do it in an aluminium pot.

And store it in a airtight plastic pot, because it reacts with air to form Coppercarbonate ( Green powder )

[fishy1]

And store it in a airtight plastic pot, because it reacts with air to form Coppercarbonate ( Green powder )

i idn't know that, thanks.