GCSE chemistry ocr Precipitation reactions GCSE chemistry revision of Precipitation reactions 2.0 / 5 based on 2 ratings ? ChemistryEnergy of reactions/Exothermic and endothermic reactionsGCSEOCR Created by: harryCreated on: 02-04-13 15:29 What is a precipitation reaction A reaction that makes a precipitate 1 of 10 What is a precipitate? An insoluble solid 2 of 10 What form do the reactants usually take? The are usually ionic solutions 3 of 10 Why are the reactions fast? Because there is a high collision frequency between the ions 4 of 10 What is the test for sulfate ions? Adding dilute HCl (hydrochloric acid) followed by barium chloride 5 of 10 What colour precipitate is formed if there are sulfate ions present? White 6 of 10 What is the test for Halides? Adding dilute nitric acid and lead nitrate 7 of 10 What colour precipitate is formed if there are chloride ions present? White 8 of 10 What colour precipitate is formed if there are bromide ions present? Cream 9 of 10 What colour precipitate is formed if there are iodide ions present? Yellow 10 of 10
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