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Solubility Test, Alcoholic Silver Nitrate Test, Bromine Test, Bromine…

- - - - test liquid
        
        If gray to white precipitate manifests = positive test
        
        No precipitate after 5 mins, heat on a steam bath
        
        Note observation
        
        To dispose
        
        2-3 drops of 5% nitric acid
        
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- - - - Dissolve solid sample in ethanol
        
        5 drops into test tube
- - - - Note observation
- - - - For slightly insoluble solids
        
        4-6 drops of 6M aqueous NaOH
      - dropwise saturated bromine-water reagent
        
        Mix well until bromine color no longer disappears
        
        Note for precipitation
        
        Note observation
- - - - Note observation
- - - - 0.2mL 6M NaOH dropwise
        
        Heat in water bath until it boils
        
        Cool down to room temperature
        
        dropwise 2M HCl until solution becomes acidic
        
        If cloudiness is observed
        
        2 mL 95% ethanol
        
        2 drops of 3% ferric chloride solution
        
        Note observation
- - - - Shake test tube
        
        Observe possible formation of second phase
- - - - 1 drop of chromic acid reagent
        
        Mix well
        
        Note observation
        
        Dispose in designated waste bottle
- - - - 4-5 drops 2% aq. iron(III) chloride
- - - - dropwise KI/I2 solution until dark color remains
        
        Agitate solution
        
        If no precipitate forms
        
        War test tube in hot water bath (~60C) for few minutes
        
        3-5 drops 5% aq. NaOH until color disappears
        
        Shake it continuously
        
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        Still at 60C
        
        If dark color disappear
        
        KI/I2 solution until it stays dark for 2 minutes at 60C
- - - - 5mL 2,4-DNPH reagent
        
        Mix well
        
        If not precipitate forms, gently heat for 30 secs, shake the tube
        
        Note observations
- - - - Agitate test tube to mix well
        
        Leave for 15 mins
        
        Warm in 30-45C water bath for few mintes
        
        If no silver mirror is observed on test tube walls
        
        Be careful not to disturb the tube after initial mixing
        
        Note observation
        
        Destroying Tollens' reagent
        
        small amt of dilute nitric acid to test tube
        
        2 more items...