What mass of zinc must be dissolved in sulfuric acid to obtain hydrogen, which can be used to reduce

What mass of zinc must be dissolved in sulfuric acid to obtain hydrogen, which can be used to reduce copper oxide (2) weighing 14.4 g? Consider that hydrogen is needed for reduction in a double volume?

Reduction of copper oxide is described by the following equation:

CuO + H2 = Cu + H2O;

Find the amount of copper oxide.

M CuO = 64 + 16 = 80 grams / mol;

N CuO = 14.4 / 80 = 0.18 mol;

To restore such an amount of oxide, it is necessary to take 0.18 x 2 = 0.36 mol of hydrogen.

Metallic zinc is actively dissolved in hydrochloric acid to form a water-soluble salt.

The chemical reaction is described by the following equation:

Zn + 2HCl → ZnCl2 + H2;

To obtain 0.25 mol of hydrogen, 0.25 mol of zinc must be dissolved.

Let’s calculate its weight.

M Zn = 65 grams / mol;

m Zn = 0.36 x 65 = 23.4 grams;