Chemistry
State the substance/s reacted with dilute or concentrated sulphuric acid to form the following gases:
(i) Hydrogen
(ii) Carbon dioxide.
State whether the acid used in each case is dilute or concentrated.
Sulphuric Acid
32 Likes
Answer
(i) Zinc, Iron or any active metal reacts with dilute Sulphuric Acid (H2SO4) to form Hydrogen. The reactions are shown below:
Zn + H2SO4 (dil.) ⟶ ZnSO4 + H2 [g]
Fe + H2SO4 (dil.) ⟶ FeSO4 + H2 [g]
(ii) Carbonates and bicarbonates react with dilute Sulphuric Acid (H2SO4) to give Carbon dioxide (CO2). The reactions are shown below:
Na2CO3 + H2SO4 (dil.) ⟶ Na2SO4 + H2O + CO2
2KHCO3 + H2SO4 (dil.) ⟶ K2SO4 + 2H2O + 2CO2
Answered By
19 Likes
Related Questions
Sulphuric Acid — Manufacture-Contact process
Sulphuric Acid Complete and balance the equations Manufacture-Contact process 1. Step 1 [sulphur or pyrite burner] S + O2 ⟶ …………… ;
FeS2 + O2 ⟶ …………… + ……………2. Step 2 [contact chamber] SO2 + O2 ⟶ …………… 3. Step 3 [absorbtion tower] SO3 + H2SO4 ⟶ …………… ;
…………… + H2O ⟶ 2H2SO4Chemical properties of sulphuric acid
Sulphuric Acid Complete and balance the equations As an acid [dilute] 4. Forms hydronium ions in aq. soln. H2SO4 + 2H2O ⟶ …………… + SO42- Reaction with 5. Active metal [zinc] Zn + H2SO4 ⟶ …………… + …………… [g] 6. Base [Sodium oxide] Na2O + H2SO4 ⟶ …………… + …………… 7. Base [Sodium hydroxide] NaOH + H2SO4 ⟶ …………… + …………… 8. Carbonate [Potassium carbonate] K2CO3 + H2SO4 ⟶ …………… + …………… + …………… [g] 9. Sulphite [Sodium sulphite] Na2SO3 + H2SO4 ⟶ …………… + …………… + …………… [g] 10. Bisulphite [Sodium bisulphite] NaHSO3 + H2SO4 ⟶ …………… + …………… + …………… [g] 11. Sulphide [Iron [II] sulphide] FeS + H2SO4 ⟶ …………… + …………… As a dibasic acid 12. Basicity is two H2SO4 ⇌ …………… + SO42- 13. Dissociates in two steps H2SO4 ⇌ …………… + ……………
HSO4- ⇌ …………… + SO42-14. Forms two types of salts
- acid salt
- Normal saltNaOH + H2SO4 ⟶ …………… + ……………
2NaOH + H2SO4 ⟶ …………… + ……………As a non - volatile acid [conc.]
Displaces volatile acid from salt15. Sodium chloride NaCl + H2SO4 ⟶ …………… + …………… 16. Sodium nitrate NaNO3 + H2SO4 ⟶ …………… + …………… As an oxidising agent [conc. acid]
Oxidation of17. Carbon C + H2SO4 ⟶ …………… + H2O + …………… 18. Sulphur S + H2SO4 ⟶ …………… + H2O 19. Phosphorous P + H2SO4 ⟶ …………… + H2O + …………… 20. Copper Cu + H2SO4 ⟶ …………… + H2O + …………… 21. Zinc Zn + H2SO4 ⟶ …………… + H2O + …………… 22. Hydrogen iodide HI + H2SO4 ⟶ …………… + H2O + …………… 23. Hydrogen sulphide H2S + H2SO4 ⟶ …………… + H2O + …………… As a dehydrating agent [conc. acid] 24. Glucose C6H12O6 ⟶ …………… + H2O 25. Sucrose C12H22O11 ⟶ …………… + H2O 26. Cellulose [C6H10O5]n ⟶ …………… + H2O 27. Formic acid H.COOH ⟶ …………… + H2O 28. Oxalic acid H2C2O4 ⟶ …………… + …………… + H2O 29. Hydrated copper sulphate CuSO4.5H2O ⟶ …………… + H2O Write the equations for the lab. preparation of:
(i) Na2SO4 using dil. H2SO4,
(ii) PbSO4 using dil. H2SO4
State the name of the process by which H2SO4 is manufactured. Name the catalyst used.