Tests for positive ions 3.0 / 5 based on 1 rating ? ChemistryTesting and analysing substancesGCSEAQA Created by: CharCreated on: 19-05-13 15:48 What are the charges of the hydroxides of most metals? 2+ and 3+ 1 of 9 What does make them? Insoluble in water 2 of 9 So when sodium hydroxide is added to solutions of these ions what is formed? A precipitate of the metal hydroxide forms 3 of 9 What do aluminium, magnesium and calcium form? White precipitates 4 of 9 Which precipitate when added to sodium hydroxide solution dissolves? Aluminium hydroxide 5 of 9 What colour is copper hydroxide? Blue 6 of 9 Iron (II) hydroxide? Green 7 of 9 Iron (III) hydroxide? Brown 8 of 9 Fe (3+) + 3OH (-) = Fe(OH)3 9 of 9
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