Test-Tube Reactions Flashcards
Test for alkenes
Bromine water
Result for present alkene
Orange to colourless in bromine water
Test for haloalkanes
•NaOH +heat
•acidify with HNO3
•add AgNO3
•add dilute NH3
•add conc NH3
Result for Cl ions in AgNO3
White ppt
Result for Br ions in AgNO3
Cream ppt
Result for I ions in AgNO3
Yellow ppt
Result for Cl ions in dilute NH3
Colourless
Dissolve
Result for Br ions in dilute NH3
NVC
Result for Br ions in conc NH3
Colourless
Dissolve
Result for I ions in conc NH3
NVC
Test for primary or secondary alcohols
•acidified K2Cr2O7
•heat
Result for primary or secondary alcohols
Orange to green
Test for aldehyde
Fehlings sol
Tollens reagent
Result for aldehyde
Tollens- silver mirror
Fehlings- brick red ppt
Test for carboxylic acid
Add carbonate