Organic Analysis Flashcards
1
Q
test for alkenes
A
shake with bromine water
- orange to colourless
2
Q
test for halogenalkanes
A
- add NaOH
- acidify with HNO3
- add AgNO3
- produces precipitate
3
Q
test for alcohol
A
- add acidified K2Cr2O7
- orange to green
4
Q
test for aldehydes
A
warm with fehlings solution - brick red precipitate
warm with tollens reagent - silver mirror
5
Q
test for carboxylic acid
A
- add NaHCO3
- CO2 given off
6
Q
how does high resolution mass spectrometry work?
A
measure molecular mass to 3.dp/4 d.p. so more accurate
7
Q
how does low resolution mass spectrometry work?
A
compound enters mass spectrometer
output presented as graph of relative abundance against mass/charge ratio
the molecular ion is the ion which has not undergone fragmentation
