What Is Cu Oxidation Number? The oxidation number of metallic copper is zero. In its compounds, the most common oxidation number of Cu is +2. Less common is +1. What is the oxidation charge of Cu II? An example of a +2 oxidation state is CuO, where oxygen has an oxidation number of -2 and
Does Copper Oxide Dissolve? Does copper oxide dissolve? Virtually insoluble in water or alcohols; copper(II) oxide dissolves slowly in ammonia solution but quickly in ammonium carbonate solution; it is dissolved by alkali metal cyanides and by strong acid solutions; hot formic acid and boiling acetic acid solutions readily dissolve the oxide. Is copper oxide soluble