Calculate the mass of the salt obtained by the action of an excess of zinc per 100 g of a 4.9% sulfuric acid solution.
September 2, 2021 | education
| Zinc metal reacts with sulfuric acid to release hydrogen gas and form zinc sulfate. The reaction is described by the following equation:
Zn + H2SO4 = ZnSO4 + H2;
1 mole of metal reacts with 1 mole of acid. This synthesizes 1 mol of salt and 1 mol of hydrogen.
Let’s calculate the amount of the correct acid.
M H2SO4 = 2 + 32 + 16 x 4 = 98 grams / mol;
N H2SO4 = 100 x 0.049 / 98 = 0.05 mol;
During the reaction, 0.05 mol of zinc sulfate will be synthesized. Let’s calculate its weight.
M ZnSO4 = 65 + 32 + 16 x 4 = 161 grams / mol;
m ZnSO4 = 0.05 x 161 = 8.05 grams;
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