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AQA A Level Chemistry Mass Spectrometry
Ionisation, Acceleration, Drift, Detection.
What are the 4 stages of Mass Spectrometry?
1500-500 - It's unique to each compound, and can be compared against known fingerprint regions to spot differences.
What is the fingerprint region?
1 peak
How many peaks for 1 type of bond on IR spec
Add NaOH and warm, then acidify the HNO3 and add AgNO3, a ppt will form due to the formation of Ag + the halogen
Cl= white
Br= Cream
I= Yellow
How do you test for haloalkanes?
Add acidified potassium dichromate and heat
colour change from orange to green for 1/2 alcohols no change for 3
How do you test for alcohols
Warm feelings, blue → brick red ppt
OR
Warm tollens → silver mirror formation (Ag)
2 ways to test for aldehydes
Add sodium carbonate → CO2 released (effervesences)
How do you test for carboxylic acids?
Constantly vibrating and can absorb IR in the same frequency
Why do chemical bonds absorb IR
faster vibrations
What effect does a stronger bond have on the frequency of vibrations
Beam of IR with a range of frequencies passed through samples
radiation that emerges is missing frequencies that have nit be absorbed by the bond
What happens inside a IR spectrometer
Note 
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