I have made a solution of ZnCl2 from dissolving zinc metal in hydrochloric acid. While researching about zinc chloride, I came across info that
suggests the hydrate of ZnCl2 decomposes upon heating.
ZnCl2 4H2O -> ZnClOH + HCl + 3H2O
Obviously, I don't want this to happen, but I do want solid zinc chloride tetrahydrate. Currently, I have been heating my solution and evaporating off
the water. I have been keeping the temp ~70C and things look good. When the solution gets low enough, will this temperature be enough to decompose the
zinc chloride? |