Iron reacts with hydrochloric acid to produce iron(II) chloride and hydrogen gas.
Fe(s) + 2 HCl(aq) → FeCl₂(aq) + H₂(g)
What mass of H₂(g) is produced from the reaction of 5.2 g Fe(s) with excess hydrochloric acid?

Question

Quizplus · Accepted Answer

First, we need to balance the equation:
Fe(s) + 2 HCl(aq) → FeCl2(aq) + H2(g)

Next, we can use stoichiometry to determine the mass of hydrogen gas produced:
5.2 g Fe × (1 mol Fe/55.85 g Fe) × (1 mol H2/1 mol Fe) × (2.02 g H2/1 mol H2) = 0.19 g H2

Therefore, the mass of hydrogen gas produced is 0.19 g.

Iron Reacts with Hydrochloric Acid to Produce Iron(II)chloride and Hydrogen