If you heat a mixture of Zn and HCl,and

Question

heat them together until all liguid has evaporated because excess HCl will be given off. What substance is left in the dish after the liquid has evaporated.

Answer 1

Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
So H2 is a gas and goes up the fume hood, the evaporating water does the same as does any excess HCl. What's left?

Answer 2

Zn(s) + HCl(aqu)^ heat = ZnCl (zinc chloride)+ H(gaseous)

Answer 3

The equation by pem is not balanced and the ZnCl2 formula is incorrect. Also hyrogen is diatomic (H2).