Determine the volume of hydrogen that will be released by dissolving 5.6 g of iron in a solution of hydrochloric acid.

1. Let’s write the equation of the reaction of interaction of iron with hydrochloric acid:
Fe + 2HCl = FeCl2 + H2;
2. The molecular weight of iron is 56 g / mol. Let’s find the amount of substance in iron:
5.6 / 56 = 0.1 mol;
3. There is the same coefficient in front of hydrogen as in front of iron. This means that the amount of substance in hydrogen is 0.1 mol. Let’s find the volume of the formed hydrogen:
22.4 * 0.1 = 2.24 mol;
Answer: the volume of released hydrogen is 2.24 liters.