Chapter 16 - Organic Analysis

Question 1

How to test for an Alkene?

Answer 1

Shake with Orange Bromine Water

Solution should be discoloured

Question 2

How to test for Halogenoalalkanes?

Answer 2

1. Add aqueous Sodium Hydroxide, NaOH
2. Add Warm Nitric Acid
3. Add aqueous silver Nitrate

Solution should become a precipitate of AgX

Question 3

How do we test for Primary/Secondary Alcohols?

Answer 3

Using Acidified Potassium Dichromate

Turns Orange to Green

Question 4

How do we test for Aldehydes?

Answer 4

1. Tollens Regent, silver mirror produced
2. Fehling’s Solution, blue to red precipitate produced

Question 5

What is High Resolution Mass Spectrometry?

Answer 5

It Mass Spectrometry but allows us to view the mass more accurately to help distinguish compounds that would have the same mass if rounded

Question 6

What may happen to the Mr in Mass Spectrometry?

Answer 6

It may decrease due to fragmentation during TOF or Ionisation

Question 7

What is IR Spectroscopy?

Answer 7

Increasing vibrational energy in a covalent bound IR radiation to help us identify the bonds within the sample

Question 8

What affects the frequency of IR absorbed?

Answer 8

1. The position of the bond
2. Mass of the bond, vibrational energy is inversely proportional to mass

Question 9

What is the Fingerprint Region?

Answer 9

The area under 1500cm^-1 which contains vibrations unique compared to every other compound