Chemical testing 0.0 / 5 ? ChemistryTesting and analysing substancesGCSEAQA Created by: EllieCreated on: 06-05-13 14:41 How do you do a flame test? at concentrated HCL to a sample and place it on a platinum wire into the side of a blue flame. 1 of 25 What colour does Lithium go in a flame test? Crimson 2 of 25 What colour does sodium go in a flame test? Yellow 3 of 25 What colour does potassium go in a flame test? lilac 4 of 25 What colour does calcium go in a flame test? red 5 of 25 What colour does Barium go in a flame test? green 6 of 25 What do you add to metal ions to form a precipitate? sodium hydroxide 7 of 25 What metal makes a blue precipitate? copper 2 8 of 25 What metal makes a brown precipitate? iron 3 9 of 25 what metal makes a green precipitate? iron 2 10 of 25 Which metals make a white precipitate? Calcium magnesium aluminium 11 of 25 How can you distinguish aluminium from calcium and magnesium? Add excess sodium hydroxide and it will dissolve to form a colourless solution 12 of 25 How do you test for Halide ions? add silver nitrate and nitric acid to form a precipitate 13 of 25 Which halide forms a white precipitate? chloride 14 of 25 Which metal ion makes a yellow precipitate? iodide 15 of 25 Which halide forms a cream precipitate? Bromide 16 of 25 How do we test for sulfate ions? Sulfate ions form a white precipitate when barium chloride and hydrochloric acid are added 17 of 25 How do we test for carbonates? add dilute hydrochloric acid 18 of 25 If a carbonate is present what happens? It effervesces (fizzes) 19 of 25 If an experiment involves a weak acid and a strong alkali what indicator will you use? Phenolphthalein 20 of 25 What colours methyl orange in alkali? yellow 21 of 25 What colour is Phenolphthalein in alkali? magenta 22 of 25 What colour are Phenolphthalein and methyl orange at neutral? pink 23 of 25 What colour is methyl orange in an acid? orange 24 of 25 What colour is phenophthalein in an acid? colourless 25 of 25
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