Analysing substances 0.0 / 5 ? ChemistryAnalysing substancesGCSEAQA Created by: 12hjoelsCreated on: 06-12-16 17:06 What ions can be tested for? Anions, cations~ carbonates, halides, sulfates 1 of 12 What are the two ways to test for anions? Flame test, sodium hydroxide 2 of 12 What could the results of the flame test be? (metal + colour) Lithium = crimson, calcium = red, pottassium = lilac, barium = green, sodium = yellow 3 of 12 What could the results be from sodium hydroxide? (metal + colour precipitate) Copper II = blue, Iron II = green, Iron III = brown, Aluminium&Magnesium&Calcium = white 4 of 12 What will happen if excess sodium hydroxide is added? (only to white precipitates) Aluminium = white precipitate disolves, Magnesium&Calcium = no change 5 of 12 Describe the test for cations~carbonates? Add dilute acid -> carbon dioxide+water produces, Put gas given off through limewater 6 of 12 What will be the result of the cations~carbonates test be if they were present? White preciptate which turns limewater cloudy 7 of 12 What ions does the halide test test for? Chorides, Bromides, Iodides 8 of 12 Describe the halides test? Add nitric acid, Add silver nitrate 9 of 12 What could the results of the halides test be? Chlorides = white, Bromides = cream, Iodides = yellow 10 of 12 Describe the sulphates test? Add hydrochloric acid, Add barium chloride 11 of 12 What would the result of the sulphates test be if they were present? White precipitate 12 of 12
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