Copper (II) chloride reduction with Hydrogen gas I've been looking into making pure copper (I) chloride, but using ascorbic acid is relatively expensive for me. I'd also like to avoid having water in any part of the synthesis to minimize the contamination with copper (II) chloride. Therefore, I came up with the idea of doing the synthesis in ethanol and bubbling through H2 according to the reaction

$$\ce{2 CuCl2 (aq) + H2 (g) -&gt; 2 CuCl (s) + 2 HCl (g)}$$

So my main question is: could this work?
There are better ways to do it.  Copper (II) can be reduced to copper (I) with a variety of reagents, especially in the presence of a soft-base halide ion such as chloride which precipitates or complexes with the copper (I) (which is a good way to prevent "overshooting" to metallic copper).  Some specific approaches can be seen here.