Chemical Tests for Metal Ions 0.0 / 5 ? ChemistryChemical Tests for Non-Metal IonsIGCSEEdexcel Created by: OliviaCreated on: 17-03-14 09:43 Definition of Precipitate A precipitate is the product of a reaction that is insoluble in the solvent of the reactants. 1 of 6 Calcium - Ca2+ (aq) Test- Add sodium hydroxide in drops. Result- White precipitate forms, which remains even when excess sodium hydroxide is added 2 of 6 Copper (II) - Cu2+ (aq) Test- Add sodium hydroxide in drops. Result- Light blue precipitate formed. 3 of 6 Iron (II)- Fe2+ (aq) Test- Add sodium hydroxide in drops. Result- Green precipitate forms. On standing changes to reddish brown colour. 4 of 6 Iron (III)- Fe3+ (aq) Test- Add sodium hydroxide in drops. Result- Reddish Brown precipitate formed 5 of 6 Magnesium- Mg2+ (aq) Add sodium hydroxide in drops. Result- White precipitate forms, which remains even when excess sodium hydroxide is added. 6 of 6
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