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Test for ions

QuestionAnswer
Testing order Carbonates --> Sulphates --> halides
Carbonate test Add dilute strong acid
Positive carbonate test result CO2 released
CO2 Test Bubble through limewater
Positive CO2 test result Liquid turns cloudy
Sulphate test A few drops of barium nitrate
Positive sulphate test result White precipitate formed
Halide test Add nitric acid, then silver nitrate solution
Positive chlorine test result White precipitate that dissolved when dilute ammonia solution
Positive Bromine test result Cream precipitate that will only dissolve in concentrated ammonia solution
Positive Iodine test result Yellow precipiate that will not dissolve in any ammonia solution
Ammonium test Add a few drops of aqueous sodium hydroxide + heat to produce a gas
Positive ammonium test Holding a piece of damp red litmus paper will cause it to turn blue
Created by: Golbs_Helmet
 

 



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