During the interaction of zinc with sulfuric acid, 8.96 liters of hydrogen were released, the yield of which was 80%

During the interaction of zinc with sulfuric acid, 8.96 liters of hydrogen were released, the yield of which was 80% of the theoretically possible. The mass of the entered zinc is equal to ..

If granules of metallic zinc are immersed in sulfuric acid, then hydrogen will begin to evolve intensively. This chemical process is described by the following equation:

Zn + H2SO4 → ZnSO4 + H2;

The molar ratios of the reactants entering into the reaction and the synthesized substances are equal.

Knowing the volume of synthesized hydrogen, we determine its molar amount.

N H2 = 8.96 / 22.4 = 04 mol;

To obtain such an amount of hydrogen, it is necessary to dissolve 0.4 mol of zinc in 0.4 mol of acid.

The zinc weight will be:

M Zn = 65 grams / mol;

m Zn = 0.4 x 65 = 26 grams;