| A. Cara Industri | B. Cara Laboratorium |
| 1. Elektrolisis air yang sedikit diasamkan2H2O (l) → 2H2 (g) + O2 (g) |
| 1. | Logam (golongan IA/IIA) + air |
| 2K(s) + 2H2O(l) → 2KOH (aq) + H2 (g) |
| Ca (s) + 2H2O (l) → Ca(OH)2 (aq) + H2 (g) |
|
| 2. 3Fe(pijar) + 4H2O → Fe3O42(g) (s) + 4H |
| 2. | Logam dengan Eok o > O + asam kuat encer |
| Zn (s) + 2HCl (aq) → ZnCl2 (aq) + H2 (g) |
| Mg (s) + 2 HCl (aq) → MgCl2 (aq) + H2(g) |
|
| 3. 2C(pijar) + 2H2O (g) → 2H2 (g) + 2CO (g) |
| 3. | Logam amfoter + basa kuat |
| Zn (s) + NaOH(aq) → Na2ZnO2 (aq) + H2(g) |
| 2Al (s) + 6NaOH (aq) → 2Na3AlO3 (aq) + 3H2(g) |
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