Answer to Question #212279 in General Chemistry for Aadya

Question

Zinc and hydrochloric acid react according to the reaction: Zn + 2HCl → ZnCl2 + H2 . If 0.3 mol of Zn is added to 0.52 moles of HCl ,what volume of H2 is produced 

Answer 1

The chemical equation for the reaction of zinc and hydrochloric acid follows:

By Stoichiometry of the reaction:

2 moles of hydrochloric acid reacts with 1 mole of zinc metal.

So, 0.52 moles of hydrochloric acid will react with =  of zinc metal.

As, the given amount of zinc is more than the required amount. Thus, it is considered as an excess reagent.

Hydrochloric acid is a limiting reagent because it limits the formation of products.

By Stoichiometry of the reaction:

2 moles of hydrochloric acid produces 1 mole of hydrogen gas.

So, 0.52 moles of hydrochloric acid will produce =  0.26 moles of H2

Molar Mass of 0.26 H2 = 0.5244ml