How much zinc do you need to take to get 1 gram of hydrogen?

The process of interaction of hydrochloric acid with zinc is described by the following equation:

Zn + 2HCl → ZnCl2 + H2;

The molar amount of zinc reacted is equal to the amount of hydrogen synthesized.

Let’s calculate the molar amount of synthesized hydrogen. Divide its weight by molar mass.

M H2 = 2 grams / mol;

N H2 = 1/2 = 0.5 mol;

To obtain such an amount of hydrogen, it is necessary to dissolve 0.5 mol of zinc.

Let’s calculate its weight.

M Zn = 65 grams / mol;

m Zn = 65 x 0.5 = 32.5 grams;