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1. Zn + 2 HCl → ZnCl2 + H2

2. Treating of aluminum powder with NaOH or KOH solutions.

2 Al + 6 H2O + 2 NaOH → 2 NaAl(OH)4 + 3 H2

Aluminium2 Al + 6 H2O + 2 OH− → 2 Al(OH)−

4 + 3 H2

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12y ago
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11y ago

You can prepare hydrogen in a bunch of different ways; many metals combine with certain acids to yield hydrogen gas in a single replacement reaction. One easy and quick way to produce it is to combine aluminum foil with a concentrated sodium hydroxide (NaOH) solution. This yields the salt sodium aluminate and hydrogen, and it does it much more quickly than the metal to acid reaction.

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8y ago

Two simple methods are:
- reaction of zinc with hydrochloric acid
- reaction of aluminium with sodium hydroxide

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Q: How do you prepare hydrogen in a laboratory?
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