6 grams of hydrochloric acid (HCl) reacted. iron (Fe) containing 5% impurities, how much hydrogen (H) will be released in this case?

1. The reaction proceeds according to the equation:

Fe + 2HCl = FeCl2 + H2 ↑;

2. find the mass of pure iron:

m (Fe) = (1 – w (impurities)) * m (sample Fe) = 0.95 * 6 = 5.7 g;

3. define the chemical amounts of iron and hydrogen:

n (Fe) = m (Fe): M (Fe) = 5.7: 56 = 0.102 mol;

n (H2) = n (Fe) = 0.102 mol;

4.Calculate the volume of released hydrogen:

V (H2) = n (H2) * Vm = 0.102 * 22.4 = 2.28 liters.

Answer: 2.28 liters.