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File: 1788769958004a.png 📥︎ (75.2 KB, 600x800) ImgOps

Chud 10/17/26 (Sat) 12:12:49 №18498778 [Quote]

I want to clear an old copper coin from copper oxide that appeared there over time. Any chemistryGODs here? What can disolve copper oxide but not copper itself

Chud 10/17/26 (Sat) 12:13:50 №18498788 [Quote]

Oh and forgot to mention its black, thus its divalent copper oxide (CuO)

Chud 10/17/26 (Sat) 12:15:46 №18498800 [Quote]

Bump this is an interesting question

Chud 10/17/26 (Sat) 12:17:31 №18498803 [Quote]

Vinegar.

Chud 10/17/26 (Sat) 12:19:00 №18498808 [Quote]

>>18498803
Thanks

Chud 10/17/26 (Sat) 12:22:56 №18498817 [Quote]

File: 1792235334432b.png 📥︎ (115.13 KB, 676x1021) ImgOps

>>18498808
No problem

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