How many grams of hydrogen will be released when 50 g of zinc react with hydrochloric acid?

When dissolved in hydrochloric acid, metallic zinc is converted to zinc chloride.

Zn + 2HCl = ZnCl2 + H2;

Let’s calculate the chemical amount of metallic zinc. To do this, divide its weight by the mass of 1 mole of metal.

N Zn = 50/65 = 0.77 mol;

With this amount of zinc, 0.77 x 2 = 1.54 mol of acid reacts. This will synthesize 0.77 mol of hydrogen and 0.77 mol of zinc chloride. Let’s calculate the weight of hydrogen. To this end, we multiply the amount of substance by the weight of 1 mole of gas.

M H2 = 2 grams / mol;

m H2 = 0.77 x 2 = 1.54 grams;