Zinc + Hydrochloric Acid

Question

a small piece of zinc into a test tube containing 1-2 ml of 1.0 M hydrochloric acid solution

1.) What is the complete balanced equation?

2.) What are the oxidation numbers?

3.) What are the half reactions?

4.) What substance was oxidized? What substance was reduced?

Answer 1

1.) Zn(s) + 2HCl(aq) ==> ZnCl₂(aq) + H₂(g)

2.) 0.........+1 -1...............+2..-1............0.........oxidation numbers

3.) Zn ==> Zn²⁺ + 2e- oxidation half reaction

2H⁺ + 2e- ==> H₂ reduction half reaction

4.) Zn was oxidized and H in HCl was reduced