Calculate the mass of hydrogen obtained by reacting 9.8 g of sulfuric acid with zinc.

When dissolved in sulfuric acid, metallic zinc is converted to zinc sulfate. Zinc is a divalent metal. Therefore, during the reaction, it interacts with the same amount of sulfuric acid. The same chemical amount of zinc sulfate is synthesized. The reaction is described by the following chemical reaction equation:

Zn + H2SO4 = ZnSO4 + H2;

Let’s calculate the chemical amount of sulfuric acid. To do this, 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 = 9.8 / 98 = 0.1 mol;

This will synthesize 0.1 mol of hydrogen. Let’s calculate its weight. To do this, we multiply the amount of substance by the weight of 1 mole of gas.

M H2 = 2 grams / mol;

m H2 = 0.1 x 2 = 0.2 grams;