Organics 0.0 / 5 ? ChemistryEnthalpyASAQA Created by: theya4Created on: 28-11-13 17:53 What happens to halogen boiling points as you move down the group? It increases 1 of 21 What happens to electronegativity as you move down the group? It decreases 2 of 21 Define electronegativity The ability of an atom to attract the bonding pair of electrons towards itself 3 of 21 What do halogens do when the react? They gain electrons 4 of 21 What happens to an atoms ability to oxidise as it moves down the group? It decreases. 5 of 21 What kind of reactions to halegons undergo? Displacement reactions 6 of 21 What will a halogen do to a halide below it in the periodic table? It will displace it. 7 of 21 What is the test for Halide ions? Add dilute nitric acid, then add silver nitrate. 8 of 21 What precipitate will be shown when fluoride is dissolved in silver nitrate? No precipitate 9 of 21 What precipitate will be shown when chloride is dissolved in silver nitrate? White precipitate 10 of 21 What precipitate will be shown when bromide is dissolved in silver nitrate? Cream precipitate 11 of 21 What precipitate will be shown when iodide is dissolved in silver nitrate? Yellow precipitate 12 of 21 How can you check the results of the first test for halide ions? Dissolve the precipitates in ammonia 13 of 21 What happens to the precipitate of chloride ions and silver nitrate when dissolved in ammonia? The precipitate will dissolve in dilute ammonia 14 of 21 What happens to the precipitate of bromide ions and silver nitrate when dissolved in ammonia? The precipitate will dissolve in concentrated ammonia 15 of 21 What happens to the precipitate of iodide ions and silver nitrate when dissolved in ammonia? The precipitate is insoluble in concentrated ammonia 16 of 21 What happens to the reducing power of halide ions as you go down the group? The reducing power increases as you go down the group 17 of 21 What does the halide ion need to do in order to reduce something? It must lose an electron 18 of 21 What is the equation for the reaction between NaF and H2SO4 NaF + H2SO4 = NaHSO4 + HF 19 of 21 What is the equation for the reaction between NaCl and H2SO4 NaCl + H2SO4 = NaHSO4 + HCl 20 of 21 Equation for SodiumBromide and Sulfuric acid 1st step Step one NaBr + H2SO4 = NaHSO4 + HBr 21 of 21
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