Sciencemadness Discussion Board

CuO and NaOH

Abromination - 18-8-2018 at 16:01

Fairly beginner question: In what conditions does sodium hydroxide react with copper oxide to make sodium cuprate? For example, what temperature and concentration does the NaOH have to be?

Foeskes - 18-8-2018 at 17:11

I've heard it reacts with copper hydroxide to dissolve it but I've never tried it.
Quote:

Copper(II) anions are most common, especially the chlorocuprates, such as trichlorocuprate(II) [CuCl3]−, tetrachlorocuprate(II) [CuCl4]2− and pentachlorocuprate(II) [CuCl5]3−.[1] The light blue solid sodium tetrahydroxycuprate is well known; it is prepared by heating cupric hydroxide with concentrated sodium hydroxide.[4] Cu(OH)2 + 2 NaOH → Na2Cu(OH)4

From Wikipedia
Potassium cuperate can be made by reacting potassium peroxide with copper oxide at a high heat in a atmosphere of pure oxygen.