Chemistry
| Preparation of hydrogen [Laboratory method] | |
|---|---|
| By action of dilute acid on zinc | |
| 15. Zinc | Zn + HCl ⟶ …………… + …………… [g] |
| Preparation of hydrogen [Industrial method - Bosch process] | |
| 16. Step I - Production of water gas | C + H2O ⟶ [ …………… + …………… ] - Δ (1000°C) |
| 17. Step II - Reduction of steam to hydrogen by carbon monoxide | CO + H2 + H2O ⟶ …………… + …………… [g] (450°C / Fe2O3) |
| 18. Step III - Removal of unreacted carbon dioxide and carbon monoxide from the above mixture | KOH + CO2 ⟶ …………… + …………… [g] CuCl + CO + H2O ⟶ …………… |
Hydrogen
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Answer
| Preparation of hydrogen [Laboratory method] | |
|---|---|
| By action of dilute acid on zinc | |
| 15. Zinc | Zn + 2HCl ⟶ ZnCl2 + H2 [g] |
| Preparation of hydrogen [Industrial method - Bosch process] | |
| 16. Step I - Production of water gas | C + H2O ⟶ [ CO + H2 ] - Δ (1000°C) |
| 17. Step II - Reduction of steam to hydrogen by carbon monoxide | CO + H2 + H2O ⟶ CO2 + 2H2 [g] (450°C / Fe2O3) |
| 18. Step III - Removal of unreacted carbon dioxide and carbon monoxide from the above mixture | 2KOH + CO2 ⟶ K2CO3 + H2O [g] CuCl + CO + 2H2O ⟶ CuCl.CO.2H2O |
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Preparation of hydrogen
[General Methods]Reactions of active metals - cold water 1. Potassium K + H2O ⟶ …………… + …………… [g] 2. Sodium Na + H2O ⟶ …………… + …………… [g] 3. Calcium Ca + H2O ⟶ …………… + …………… [g] Reaction of metals with steam 4. Magnesium Mg + H2O ⟶ …………… + …………… [g] 5. Aluminium Al + H2O ⟶ …………… + …………… [g] 6. Zinc Zn + H2O ⟶ …………… + …………… [g] 7. Iron Fe + H2O ⇌ …………… + …………… [g] Reactions of metals with dilute acids 8. Magnesium Mg + HCl ⟶ …………… + …………… [g] 9. Aluminium Al + H2SO4 ⟶ …………… + …………… [g] 10. Zinc Zn + HCl ⟶ …………… + …………… [g] 11. Iron Fe + HCl ⟶ …………… + …………… [g] Reactions of metals - alkali [conc. soln.] 12. Zinc Zn + NaOH ⟶ …………… + …………… [g]
Zn + KOH ⟶ …………… + …………… [g]13. Lead Pb + NaOH ⟶ …………… + …………… [g] 14. Aluminium Al + NaOH + H2O ⟶ …………… + …………… [g]
Al + KOH + H2O ⟶ …………… + …………… [g]Tests and uses of hydrogen Conversion of hydrogen to 19. Water H2 + O2 ⟶ …………… 20. Hydrogen chloride H2 + Cl2 ⟶ …………… 21. Ammonia N2 + H2 ⇌ …………… 22. Hydrogen sulphide H2 + S ⟶ …………… Hydrogen in metallurgy - reduction of 23. Zinc oxide ZnO + H2 ⟶ …………… + …………… 24. Iron [III] oxide Fe2O3 + H2 ⟶ …………… + …………… Name an element which reacts violently with water at room temperature.
What do the following symbols [or formula] denote : 2H ; H2 ; H+. [two atoms, molecule, ion]