Producing Hydrogen (H)

H: Hydrogen

Cavendish (UK) discovered in 1766.

Abundance: 0.1520wt%(in the earth's crust), 0.53ppm(in the air)

Method 1

Add sodium hydroxide or sulfuric acid in water.

Electrodialysis

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Method 2

React water or acid to alkali metals, Mg, or Zn.

2X + 2H2O 2XOH + H2

X + H2SO4 2XSO4 + H2