Tests for functional groups Flashcards
Test for alkene
add bromine water - orange to colourless
Test for primary/secondary alcohol
warm with acidified potassium dichromate - orange to green
Test for aldehyde
warm with Tollen’s reagent - silver mirror (precipitate)
Test for aldehyde 2
warm with Fehling’s solution - red precipitate
Test for chloroalkane
warm with silver nitrate in ethanol - white precipitate
Test for bromoalkane
warm with silver nitrate in ethanol - cream precipitate
Test for iodoalkane
warm with silver nitrate in ethanol - yellow precipitate
Test for carboxylic acid
add sodium carbonate or sodium hydrogen carbonate - bubbles of CO2 - white ppt with limewater
Test for carboxylic acid 2
add magnesium - hydrogen produced - squeaky pop
Inference if Tollen’s reagent does not produce a silver mirror
ketone present (not aldehyde)
Inference if Fehling’s solution remains blue
ketone present (not aldehyde)
Inference if alcohol does not turn potassium dichromate from orange to green
tertiary alcohol