instrumental analysis

Question 1

what is the mass spectrometer used to find

Answer 1

used to identify different elements and find relative isotopic masses of elements

Question 2

describe ionization in mass spectrometer

Answer 2

atom (or molecule) ionized - knocking its electrons off to give positive charged ion. electron removed will cause bonds to break and molecules fragment

Question 3

describe acceleration in mass spectrometer

Answer 3

positive ions accelerated between a set of charged plates. the ions repelled by first plate and attracted to the second. a hole in the second plate allows the ions to exit into the next chamber all of them at the same kinetic energy

Question 4

describe deflection in mass spectrometer

Answer 4

ions deflected by a magnetic field according to their mass (the smaller mass to charge ratio, the smaller connected)

Question 5

describe detection in mass spectrometer

Answer 5

beam of positive ions pass through the machine and detected electronically

Question 6

what does infrared spectroscopy show

Answer 6

shows the different frequencies of bonds by showing if an alcohol is primary or secondary or it could show if its a carboxylic acid

Question 7

what does carbon-13 spectroscopy show

Answer 7

-peak number tells us number of carbon environment
- chemical shift gives value of each environment

Question 8

what does low resolution 1H NMR

Answer 8

• peaks tells us numbers of hydrogen environments