Chem 4.1 Test for Positive ions 4.5 / 5 based on 3 ratings ? ChemistryTesting and analysing substancesGCSEAQA Created by: DanCreated on: 13-04-13 11:38 Name two ways you can identify positive ions Flame test and the use of Sodium Hydroxide Solution 1 of 12 What can the flame test be used on? Metal Ions 2 of 12 When passed through a flame what colour does: Potassium Lilac 3 of 12 Sodium Yellow 4 of 12 Calcium Red 5 of 12 Barium Green 6 of 12 Lithium Crimson 7 of 12 Describe how the Sodium Hydroxide test works When Sodium hydroxide is added to a metal solution a precipitate will form 8 of 12 Give an example Copper Nitrate + Sodium Hydroxide = Copper Hydroxide Precipitate 9 of 12 State the colours of precipitates formed: Copper Hydroxide(II) Blue 10 of 12 Iron Hydroxide(II) Green 11 of 12 Iron Hydroxide(III) Brown 12 of 12
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