organic analysis

Question 1

what is the fingerprint region

Answer 1

area unique to each compound, used to spot the difference between different compounds. 1500 - 500

Question 2

what is the test for alkenes

Answer 2

shake alkene with bromine water, orange to colourless

Question 3

test for haloalkanes

Answer 3

1.add NaOH and heat
2.acidify with HNO3
3.add AgNO3
precipitate formed
Cl = white
Br = cream
I = yellow

Question 4

test for alcohols

Answer 4

1. add acidified potassium dichromate and heat
   colour change from orange to green

Question 5

2 tests for aldehydes

Answer 5

1. warm with fehlings solution
   blue to brick red colour change
2. warm with tollens reagent
   silver mirror forms

Question 6

test for carboxylic acids

Answer 6

1. Add Na2CO3 (sodium carbonate)
   CO2 released and effervescence

Question 7

what is mass spectrometry and how does it work

Answer 7

used to find the relative molecular mass of organic compounds
compounds are ionised, accelerated by a negatively charged plate which then travel through the drift region and are finally detected by a negatively charged plate.

Question 8

what is fragmentation

Answer 8

many peaks due to isotopes