Question

Write a balanced equation for the given reaction indicating the conditions of reaction and the physical states of reactants and products: Zinc reacts with dilute hydrochloric giving zinc chloride and hydrogen

Answer 1

Reactivity Series: The reactivity series is the tabular arrangement of metal in the decreasing order of their reactivity from top to the bottom.

• According to the reactivity series, the metals placed above the others are more reactive than the ones that are below them.

Reaction of Zinc with Hydrochloric acid:

• From reactivity series, a metal placed above hydrogen in reactivity series can displace hydrogen from dilute acids.
• Zinc is placed above hydrogen in the reactivity series.
• Zinc pieces react with dilute hydrochloric acid to liberate hydrogen gas and zinc chloride.

$\underset{\mathrm{Zinc}}{\mathrm{Zn}\left(\mathrm{s}\right)}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{2\mathrm{HCl}\left(\mathrm{aq}\right)}\to \underset{\mathrm{Zinc}\mathrm{chloride}}{{\mathrm{ZnCl}}_2\left(\mathrm{aq}\right)}+\underset{\mathrm{Hydrogen}}{{\mathrm{H}}_2\left(\mathrm{g}\right)}$