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Notes on Group 7/17 The Halogens - miscellaneous chemical aspects - for Advanced Level Inorganic Chemistry
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Doc Brown's Chemistry Advanced Level Inorganic Chemistry Periodic Table Revision Notes Part 9. Group 7/17 The Halogens 9.12 Miscellaneous aspects of halogen chemistry Some kinetics and equilibrium examples e.g. iron(II)/iron(III) ions catalyse the oxidation of iodide ions by peroxodisulphate, the formation/decomposition of hydrogen iodide, he formation of hydrogen iodide as an example of 'connecting' rates of reaction and equilibria, applying Le Chatelier's Principle to the HI/H2/I2 equilibrium, an example of partition iodine dissolved in a water/tetrachloromethane system and the iodineiodide equilibrium. PLEASE NOTE KS4 Science GCSE/IGCSE/O Level GROUP 7 HALOGENS NOTES are on a separate webpage INORGANIC Part 9 Group 7/17 Halogens subindex: 9.1 Introduction, trends & Group 7/17 data * 9.2 Halogen displacement reaction and reactivity trend * 9.3 Reactions of halogens with other elements * 9.4 Reaction between halide salts and conc. sulfuric acid * 9.5 Tests for halogens and halide ions * 9.6 Extraction of halogens from natural sources * 9.7 Uses of halogens & compounds * 9.8 Oxidation & Reduction more on redox reactions of halogens & halide ions * 9.9 Volumetric analysis titrations involving halogens or halide ions * 9.10 Ozone, CFC's and halogen organic chemistry links * 9.11 Chemical bonding in halogen compounds * 9.12 Miscellaneous aspects of halogen chemistry Advanced Level Inorganic Chemistry Periodic Table Index * Part 1 Periodic Table history * Part 2 Electron configurations, spectroscopy, hydrogen spectrum, ionisation energies * Part 3 Period 1 survey H to He * Part 4 Period 2 survey Li to Ne * Part 5 Period 3 survey Na to Ar * Part 6 Period 4 survey K to Kr and important trends down a group * Part 7 sblock Groups 1/2 Alkali Metals/Alkaline Earth Metals * Part 8 pblock Groups 3/13 to 0/18 * Part 9 Group 7/17 The Halogens * Part 10 3d block elements & Transition Metal Series * Part 11 Group & Series data & periodicity plots * All 11 Parts have their own subindexes near the top of the pages
9.12 Miscellaneous aspects of halogen chemistry Some kinetics and equilibrium examples Iron(II)/iron(III) ions catalyse the oxidation of iodide ions by peroxodisulphate
The formation/decomposition of hydrogen iodide
The formation of hydrogen iodide as an example of 'connecting' rates of reaction and equilibria
Applying Le Chatelier's Principle to the HI/H2/I2 equilibrium
An example of partition iodine dissolved in a water/tetrachloromethane system
Kc Iodineiodide equilibrium
PLEASE NOTE KS4 Science GCSE/IGCSE/O Level GROUP 7 HALOGENS NOTES are on a separate webpage WHAT NEXT? INORGANIC Part 9 Group 7/17 Halogens subindex: 9.1 Introduction, trends & Group 7/17 data * 9.2 Halogen displacement reaction and reactivity trend * 9.3 Reactions of halogens with other elements * 9.4 Reaction between halide salts and conc. sulfuric acid * 9.5 Tests for halogens and halide ions * 9.6 Extraction of halogens from natural sources * 9.7 Uses of halogens & compounds * 9.8 Oxidation & Reduction more on redox reactions of halogens & halide ions * 9.9 Volumetric analysis titrations involving halogens or halide ions * 9.10 Ozone, CFC's and halogen organic chemistry links * 9.11 Chemical bonding in halogen compounds * 9.12 Miscellaneous aspects of halogen chemistry keywords phrases formula: S2O82(aq) + 2I (aq) ==> 2SO42(aq) + I2(aq) 2Fe3+(aq) + 2I(aq) ==> 2Fe2+(aq) + I2(aq) 2Fe2+(aq) + S2O82(aq) ==> 2SO42(aq) + 2Fe3+(aq) rate = k[S2O82(aq)][I(aq)] H2(g) + I2(g) 2HI(g) ratef = kf [H2(g)] [I2(g)] and rateb = kb [HI(g)]2 ratef = kf [H2(g)] [I2(g)] = rateb = kb [HI(g)]2 [H2(g)] [I2(g)] = ratef / kf and [HI(g)]2 = rateb / kb I2(aq) I2(CCl4) Kpartition = [I2(aq)] / [I2(CCl4)] = 0.0116 at 298K I(aq) + I2(aq) I3(aq) as well as I2(aq) I2(CCl4) I2(CCl4) I2(aq) + I(aq) I3(aq) |
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