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| 8681451869 | preparation of oxygen | 2KClO3 - 2KCl + 3O2 (MnO2/420K) | 0 | |
| 8681455367 | preparation of fluorine | KHF2 - HF + KF | 1 | |
| 8681479919 | 2H2O2 on heating (aq) | 2H2O + O2 | 2 | |
| 8681504249 | 2O3 (temp) on heating | 3O2 (573K) | 3 | |
| 8681507035 | PbS + 4O3 | PbSO4 + 4O2 | 4 | |
| 8681510499 | O3 in all reactions | O2 + [O] | 5 | |
| 8681515876 | alkaline KI + O3 (no balancing) | KI + H2O + O3 - KOH + O2 + I2 | 6 | |
| 8681524627 | iron pyrites to SO2 (no balancing) | FeS2 + O2 - Fe2O3 + SO2 (11 O2) | 7 | |
| 8681528065 | ZnS to SO2 (no balancing) | ZnS + O2 - ZnO + SO2 | 8 | |
| 8681530654 | NaOH + SO2 | NaHSO3 | 9 | |
| 8681532553 | 2NaOH + SO2 | Na2SO3 + H2O | 10 | |
| 8681537632 | KMnO4 decolorisation reaction (no balancing) | KMnO4 + SO2 + H2O - K2SO4 + MnSO4 + H2SO4 | 11 | |
| 8681541579 | Cl2 + 2H2O + SO2 | H2SO4 + 2HCl | 12 | |
| 8681555605 | C2H5OH (conc. H2SO4) | C2H4 + H2O | 13 | |
| 8681560571 | C12H22O11 (conc. H2SO4) | 12C + 11H2O | 14 | |
| 8681561791 | HCOOH (conc. H2SO4) | CO + H2O | 15 | |
| 8681563502 | H2C2O4 (conc. H2SO4) | CO + CO2 + H2O | 16 | |
| 8681567407 | H2SO4 breaks into | H2O + SO2 + O | 17 | |
| 8681580989 | laboratory preparation of SO2 (no balancing) | Cu + H2SO4 (conc)- CuSO4 + SO2 + H2O | 18 | |
| 8681590077 | decomposition of sulphites and bisulphites to give SO2 (no balancing) (Na2SO3) | Na2SO3 + H2SO4 - Na2SO4 + SO2 + H2O (NaHSO3 gives same products // seriously no jokes) | 19 | |
| 8681614872 | contact process main reaction | 2SO2 + O2 - 2SO3 (670-720K) | 20 | |
| 8738877624 | preparation of ozone | 3O2 - (silent electric discharge) 2O3 | 21 | |
| 8738887755 | mercury oxidation by O3 // tailing of mercury | 2Hg + O3 - Hg2O + O2 | 22 |
