Determine the mass of 20% sulfuric acid solution that will be used to dissolve zinc with a mass of 5.2 g.

The reaction between zinc metal and sulfuric acid is described by the following chemical equation:

Zn + H2SO4 = ZnSO4 + H2;

When 1 molecule of zinc dissolves, 1 molecule of hydrogen is released.

Let’s calculate the chemical amount of a substance in 5.20 grams of zinc.

M Zn = 65 grams / mol;

N Zn = 5.20 / 65 = 0.094 mol;

The same amount of sulfuric acid will be needed. Let’s calculate its mass and the mass of its solution.

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

m H2SO4 = 98 x 0.094 = 9.212 grams;

The mass of a 20% acid solution will be:

m H2SO4 solution = 9.212 / 0.2 = 46.06 grams;