Functional Group Tests 0.0 / 5 ? ChemistryFunctional GroupsASAQA Created by: RhiannonMPCreated on: 16-05-19 12:37 Test and result for primary, secondary and tertiary alcohols... Add acidified potassium dichromate (VI) solution. Warm mixture. Primary and Secondary turn green. Tertiary stays orange. 1 of 8 What is a primary alcohol oxidised to? An aldehyde --> carboxylic acid 2 of 8 What is a secondary alcohol oxidised to? A ketone 3 of 8 What is a tertiary alcohol oxidised to? no reaction. 4 of 8 Benedict's Test- what does it test for? Aldehydes. Add Fehlings A and B together. Add NaCO3, anti bumping granules and ethanal. Warm solution. Result: dark blue--> red. 5 of 8 Tollen's Reagent- what does it test for? Aldehydes. Add NaOH to 2cm3 AgNO3. Add dilute ammonia to dissolve. Heat and add the test solution. a silver mirror will be produced if present. 6 of 8 Testing for Carboxylic acids... Add solid NaCO3 to solution. If it fizzes, bubble gas through limewater- should go cloudy. 7 of 8 Testing for alkenes... Bromine Water- organge to colourless. 8 of 8
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