# An excess of zinc was added to a solution of sulfuric acid weighing 500 g (Mass fraction of acid 20%).

**An excess of zinc was added to a solution of sulfuric acid weighing 500 g (Mass fraction of acid 20%). Calculate the volume of hydrogen if it is known that the volume fraction of the reaction product yield is 90%**

This chemical reaction converts zinc metal to zinc sulfate.

Zn + H2SO4 = ZnSO4 + H2;

Let’s calculate the chemical amount of sulfuric acid. For this purpose, we divide its weight by the mass of 1 mole of the substance.

M H2SO4 = 2 + 32 + 16 x 4 = 98 grams / mol;

N H2SO4 = 500 x 0.2 / 98 = 1.02 mol;

Taking into account the reaction yield of 90%, 1.02 x 0.9 = 0.918 mol of hydrogen will be synthesized. Let’s find its volume. To do this, multiply the amount of substance by the volume of 1 mole of gas (22.4 liters).

V H2 = 0.918 x 22.4 = 20.56 liters;