Chemistry
Give equation for the action of heat on –
- NH4Cl
- NH4NO3
State whether the reaction is an example of thermal decomposition or thermal dissociation.
Related Questions
Chemical properties of nitric acid
Nitric acid Complete and balance the equations Stability of nitric acid 9. Decomposition HNO3 ⟶ H2O + …………… [g] + …………… [g] Ionization of dilute nitric acid 10. Dissociation HNO3 + H2O ⇌ …………… + ……………
[HNO3 ⇌ H1+ + NO31-
H+ + H2O ⇌ H3O1+]11. Base [sodium hydroxide] NaOH + HNO3 ⟶ …………… + H2O 12. Base [magnesium hydroxide] Mg(OH)2 + HNO3 ⟶ …………… + H2O 13. Carbonate [lead carbonate] PbCO3 + HNO3 ⟶ …………… + H2O + …………… [g] 14. Bicarbonate [calcium bicarbonate] Ca(HCO3)2 + HNO3 ⟶ …………… + H2O + …………… [g] 15. Sulphite [potassium sulphite] K2SO3 + HNO3⟶ …………… + H2O + …………… [g] 16. Bisulphite [calcium bisulphite] Ca(HSO3)2 + HNO3 ⟶ …………… + H2O + …………… [g] Oxidising nature Non-metals [conc. nitric acid] 17. Carbon C + HNO3 ⟶ …………… + H2O + …………… [g] 18. Sulphur S + HNO3 ⟶ …………… + H2O + …………… [g] 19. Phorphous P + HNO3 ⟶ …………… + H2O + …………… [g] Metals (i) Cold, very dilute nitric acid [<1%] 20. Magnesium Mg + HNO3 ⟶ …………… + …………… [g] 21. Manganese Mn + HNO3 ⟶ …………… + …………… [g] (ii) Dilute nitric acid 22. Copper Cu + HNO3 ⟶ …………… + H2O + …………… [g] 23. Zinc Zn + HNO3 ⟶ …………… + H2O + …………… [g] 24. Iron Fe + HNO3 ⟶ …………… + H2O + …………… [g] (iii) Conc. nitric acid [hot dil. nitric acid] 25. Copper Cu + HNO3 ⟶ …………… + H2O + …………… [g] 26. Zinc Zn + HNO3 ⟶ …………… + H2O + …………… [g] 27. Iron Fe + HNO3 ⟶ …………… + H2O + …………… [g] 28. Aqua regia [1 part conc. HNO3 + 3 parts conc. HCl] HNO3 + 3HCl ⟶ H2O + …………… + ……………
[Au + …………… ⟶ ……………
Pt + …………… ⟶ ……………]Inorganic compounds 29. Sulphur dioxide [aq.] SO2 + H2O + HNO3 ⟶ …………… + …………… 30. Hydrogen sulphide H2S + HNO3 ⟶ …………… + …………… + …………… 31. Iron [II] sulphate [acidified] FeSO4 + H2SO4 + HNO3 ⟶ …………… + …………… + …………… Tests for nitric acid
Nitric acid Complete and balance the equations 32. Heat on nitric acid HNO3 ⟶ H2O + …………… [g]+ …………… [g]
[reddish brown fumes evolved]33. Heat on copper and conc. HNO3 Cu + HNO3 ⟶ …………… + …………… + …………… [g]
[dense reddish brown fumes evolved - blue solution remains]34. Brown ring test FeSO4 + H2SO4 + …………… ⟶ …………… + …………… + NO
[FeSO4 + NO ⟶ ……………]
[A brown ring of nitroso ferrous sulphate is formed at the junction of the two liquids]What compounds are required for the laboratory preparation of nitric acid.
State why pure nitric acid takes on a yellowish brown colour when exposed to light.