Chapter 17

Question 1

Why does the m+ 1 peak exist

Answer 1

1.1% of carbon is present as carbon 13 isotope

Question 2

What is fragmentation

Answer 2

When some molecular ions break down into smaller pieces

Use the fragments to identify the compound

Question 3

What is infrared spectroscopy used for

Answer 3

To identify the functional groups present in organic molecules

Question 4

How does spectroscopy work

Answer 4

Beam or if radiation is passed through
Some of the radiation is absorbed
Plots a graph of transmittance against wavenumber

Question 5

Ir spectrum of alcohols

Answer 5

Smooth skinny curve 3200 - 3600

Question 6

Ir carboxylic acids

Answer 6

Broad peak 3000

Question 7

Phrasing of infra red

Answer 7

Peak within range 1630-1830 caused by c=O bond

And a broad beak within range 2500-3000 caused by an OH group in a carboxylic acid

Question 8

iR uses

Answer 8

Analyse vehicle emissions to detect and measure carbon dioxide

Used in breathalysers to detect compounds in breath

Question 9

Methods of processing waste polymers

Answer 9

Recycling 
Cracking
Organic feedstock 
Combustion for energy 
Production of plastic /chemicals