Chemistry AQA Unit 3 4.5 / 5 based on 3 ratings ? ChemistryTesting and analysing substancesGCSEAQA Created by: KateCreated on: 19-05-13 15:35 Colour of potassium in Flame Test? Lilac 1 of 15 Colour of calcium in Flame Test? Red 2 of 15 Colour of lithium in Flame Test? Crimson 3 of 15 Colour of sodium in Flame Test? Yellow 4 of 15 Colour of barium in Flame Test? Green 5 of 15 What happens when you add NaOH to Copper II? Blue precipitate 6 of 15 What happens when you add NaOH to aluminium? White precipitate which then dissolves, as it's insoluble 7 of 15 What happens when you add NaOH to magnesium? White precipitate which persists 8 of 15 What happens when you add NaOH to ammonium? No precipitate 9 of 15 What happens when you add NaOH to Iron II? Green precipitate 10 of 15 What happens when you add NaOH to Iron III? Brown precipitate 11 of 15 What is the test for Carbonates? Add hydrochloric acid - if it's a carbonate, CO2 will be produced which will turn limewater cloudy 12 of 15 What is the test for halides? Add nitric acid, then silver nitrate solution. Precipitates will be formed: Chloride - white, Bromide - off-white/cream, Iodide - yellow 13 of 15 What's the test for sulphates? Add hydrochloric acid, then barium chloride solution - a sulphate will form a white precipitate 14 of 15 What's the equation for the production of ammonia N2 + 3H2 →← 2NH3 15 of 15
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