Question

What happens when dilute HCl is added to iron filings?

Answer 1

Hydrogen gas and iron chloride are produced.

Answer 2

Zn(s) + 2HCl(aq) ------) ZnCl2(aq) + H2(g) + ∆(heat)

we can see in the reaction that Zn react with HCl to form ZnCl2 and hydrogen gad which is

when practically doing the experiment you will find bubbles of hydrogen emitting from the test tube with a large amount of heat produced that you will feel on your hands if you are holding the tube without any gloves