Calculate the mass of zinc that a 100 gram 73% solution of hydrochloric acid can dissolve.

Zinc metal is converted to zinc chloride salt. The reaction is described by the following chemical equation:

Zn + 2HCl = ZnCl2 + H2;

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

M HCl = 1 + 35.5 = 36.5 grams / mol;

N HCl = 100 x 0.73 / 36.5 = 2 mol;

With this amount of acid, 2/2 = 1 mol of zinc will react.

Let’s determine its weight. To do this, multiply the amount of the substance by the weight of 1 mole of the substance.

M Zn = 65 grams / mol;

m Zn = 1 x 65 = 65 grams;