Test for Organic Functional Groups Flashcards
1
Q
how do we test for an alkene?
A
- add bromine water an dmix
- bromine water turns from orange to colourless
2
Q
how do we test for haloalkanes?
A
- add silver nitrate and ethanol and warm
- predicate of AgX forms and the colour of this ppt tells us what halogen is present
3
Q
how do we test for an alcohol?
A
- add acidified dichromate and heat
- colour change from orange to green
4
Q
how do we test for an aldehyde?
A
- add Tollens’ reagent and warm
- silver mirror forms
5
Q
how do we test for carbonyl compounds?
A
- add 2.4-dinitrophenylhydrazine
- orange precipitate forms
6
Q
how do we test for carboxylic acids?
A
- add NaHCO3
- effervescence
7
Q
how do we test for phenols?
A
- it’s a weak acid
- phenol does not react with CO3(2-)
- such as sodium carbonates