Question

The reactants zinc and hydrochloric acid are involved in a redox reaction. Which of the following is a product of the reaction?

Select the correct answer below:

Cl2(g)

H2(g)

ZnCl(aq)

none of the above

Answer 1

Zinc reacts with HCl to form ZnCl2(aq) & H2(g). Zn(s) + 2H+(aq) = Zn2+(aq) + H2(g): Zinc is oxidized, loses electrons. Hydrogen is reduced, gains electrons.

Zn + HCl = H2 + ZnCl2

It is a single displacement reaction where -

Zinc is oxidised (it becomes positive) and water is neutralized. It is a reduction-oxidation reaction where one of the reactants loses oxygen and the other one gains.

So, answering your question, we get hydrogen gas and a salt.

Hydrogen gas, is identified by exposing it to a burning flame. It explodes (a bit,) with a pop sound. This is because Hydrogen is highly explosive.

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