/sci/ - Science & Math

>>15648682
>>15648828

5. let the solution cool down a bit (so you can hold it), then filter with a coffee filter. wash with boiling hot distilled water to remove as much impurities as you can (so the soluble aluminum sulfate gets washed out).
if you do not care about wastewater volume, you can use like a liter of hot boiling water to wash out any remaining impurities.

(if it were me, i would also wash it with pure hydrochloric acid (HCl) BUT commercial hydrochloric acid is usually contaminated with iron (which is why they're yellowish), so i would advise against this - unless you want to also purify hydrochloric acid too.)

6. if you're planning to store the copper powder for a decent amount of time, store it immersed in clean distilled water in a sealed closed container - this is to prevent the copper from oxidizing into copper oxide (CuO). if you have some dry inert gas around, you could store dry copper powder with it so you can avoid the hassle of having to evaporate away the water.

7. if you're planning to use it right away, dry the moist copper powder. you can do this by leaving it out for a day or drying it in somewhere warm (maybe like around 100°C max).

just make sure the powder doesn't turn black. the problem with drying copper powder is that the longer you leave it exposed to air and the higher the temperature is, the more it'll "rust" into black copper oxide.

if there's any errors in this post, i won't be able to correct it in time since i live in a way different timezone (UTC+8; basically asia timezone). if another chem anon is there, please do the needful sir

for amateur chemistry shit, sciencemadness is a good resource
https://www.sciencemadness.org/smwiki/index.php/Copper

i'm a bit concerned about contamination by aluminum, but i think this is the best we could do right away

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