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. Aqueous hydrochloric acid reacts with zinc metal to yield hydrogen gas and aqu

ID: 757781 • Letter: #

Question

. Aqueous hydrochloric acid reacts with zinc metal to yield hydrogen gas and aqueous zinc chloride. Write a net ionic equation for the process: 2 HCl(aq) + Zn(s) ? H2(g) + ZnCl2(aq)

Explanation / Answer

Zn(s) + 2 HCl(aq) --> ZnCl2(aq) + H2(g) + Heat since Zn is higher, it replaces the H on the HCl. To really make an ionic equation, it would look like this Zn (s) + 2 HCl (aq) ---> H2 (g) + ZnCl2 (aq) Zn(s) + 2 H+(aq) + 2 Cl-(aq) ----> H2(g) + Zn+2(aq) + 2 Cl-(aq) As you see, all elements are the same on both side (you have 2 hydrogens, 1 zinc, 2 chlorines). Since they all ionize, none are left for the net equation.