Tests for Positive and Negative Ions 0.0 / 5 ? ChemistryTesting and analysing substancesGCSEAQA Created by: MillieThomasCreated on: 05-04-14 19:10 What colour does LITHIUM give? Crimson red 1 of 14 What colour does POTASSIUM give? Purple/ Lilac 2 of 14 What colour does BARIUM give? Green 3 of 14 What colour does SODIUM give? Yellow 4 of 14 What colour does CALCIUM give? Brick Red 5 of 14 In a sodium hydroxide test, what colour precipitate will COPPER (II) make? Blue Precipitate 6 of 14 In a sodium hydroxie test, what colour precipate will IRON (II) give? Green Precipitate 7 of 14 In a sodium hydroxide test, what colour precipitate will IRON (III) give? Brown Precipitate 8 of 14 In a sodium hydroxide test, what colour precipitate will ALUMINUM, CALCIUM and MAGNESIUM form? White Precipitate 9 of 14 How do you test for CARBONATES? and what is the REACTION? Bubble the gas produced by heating the soloution/substance into limewater, if limewater goes cloudy, carbonate is present. 10 of 14 Describe a halide test. Add the precipitate to a test tube, add dilute nitric acid and silver nitrate, if precipitate forms, halides are present 11 of 14 What halide is present if there is a white precipitate? Chloride 12 of 14 What colour precipitate does iodide form? Yellow precipitate 13 of 14 What colour precipitate does bromide form? Cream Colour 14 of 14
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