Calculate the mass of zinc chloride if it is known that 0.02 mol of metallic zinc was consumed
| June 23, 2021 | education
Calculate the mass of zinc chloride if it is known that 0.02 mol of metallic zinc was consumed in the reaction with hydrochloric acid.
The equation for the reaction of zinc with hydrochloric acid:
Zn + 2 H Cl = Zn Cl2 + H2.
From the reaction equation it follows that from 1 mole of zinc, 1 mole of zinc chloride is obtained. Thus, from 0.02 mol of zinc as a result of reaction with hydrochloric acid, 0.02 mol of zinc chloride is obtained.
Molar mass of zinc chloride: M (Zn Cl2) = (65 + 2 × 35.5) = 136 g / mol.
The required mass of zinc chloride:
0.02 mol × 136 g / mol = 2.72 g.
Answer: the mass of zinc chloride is 2.72 g.
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