preparation of Hydrogen in laboratory
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Preparation of Hydrogen
Hydrogen gas is prepared in the laboratory by the action of dilute hydrochloric acid or dilute sulphuric acid on granulated zinc.
Zn + 2HCL → ZnCL₂ + H₂↑
Zn + H2SO₄ → ZnSO₄ + H₂↑
Granulated zinc is commercial zinc obtained from molten zinc. It contains impurities like copper which have a slight catalytic effect on the reaction and speeds up the reaction.
Hydrogen gas is prepared in the laboratory by the action of dilute hydrochloric acid or dilute sulphuric acid on granulated zinc.
Zn + 2HCL → ZnCL₂ + H₂↑
Zn + H2SO₄ → ZnSO₄ + H₂↑
Granulated zinc is commercial zinc obtained from molten zinc. It contains impurities like copper which have a slight catalytic effect on the reaction and speeds up the reaction.
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Laboratory preparation of Hydogen gas
Purification: The hydrogen gas thus obtained may contain different impurities like H2S, NO2, CO2, moisture etc. So, these impurities are removed by using suitable process to get pure hydrogen.
Very pure hydrogen gas can be prepared in lab by the following reaction. This is a short and sweet method.
Mg+dil⋅H2SO4⟶MgSO4+H2↑
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