Chemical Tests
- Created by: EleAC
- Created on: 03-06-16 11:12
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- Chemical Tests
- Metal Halides
- Add dilute nitric acid. Add a few drops of silver nitrate solution.
- Positive tests = precipitate.
- Fluoride = no precipitate
- Chloride = white precipitate that dissolves in dilute ammonia.
- Bromide = cream precipitate that dissolves in concentrated ammonia.
- Iodide = yellow precipitate that is insoluble.
- Positive tests = precipitate.
- Add dilute nitric acid. Add a few drops of silver nitrate solution.
- Aldehydes
- Fehlings Test
- Contains blue copper complex ions.
- Positive test when warmed = brick red precipitate.
- Contains blue copper complex ions.
- Tollen's Silver Mirror Test
- Contains a solution of silver nitrate and aqueous ammonia.
- Positive test when warmed = the colourless silver ions are reduced to metallic silver.
- Contains a solution of silver nitrate and aqueous ammonia.
- Fehlings Test
- Halogeno alkanes
- Add aqueous sodium hydroxide and warm. Acidify with nitric acid. Add aqueous silver nitrate.
- Positive test = a precipitate of silver halide forms.
- Add aqueous sodium hydroxide and warm. Acidify with nitric acid. Add aqueous silver nitrate.
- Carboxylic acids
- Add sodium hydrogen carbonate.
- Positive test = carbon dioxide gas given off.
- Add sodium hydrogen carbonate.
- Alkenes
- Shake with bromine water
- Positive test = colour change from orange brown to colourless.
- Shake with bromine water
- Alcohols
- Add acidified potassium dichromate
- Positive test = colour change from orange to green.
- Add acidified potassium dichromate
- Metal Halides
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