Mass spectroscopy

Question 1

What does m/z mean?

Answer 1

Mass/charge ratio

Question 2

What does m/z tell us?

Answer 2

If the charge is +1, this is the relative mass

Question 3

Where is the M+ peak found?

Answer 3

Furthest right significant peak

Question 4

What is the equation to form a molecular ion?

Answer 4

X + e- -> [X]+ + 2e-

Question 5

How do you write about m/z?

Answer 5

The peak at m/z=______ is produced by the molecular ion [__]+. This tells us the molecule has an Mr of = ______. The peak at m/z = _____ is produced by the fragment ion [____]+

Question 6

What is the last peak on the mass spec?

Answer 6

M + 1 peak

Question 7

What are the equation of fragmentation?

Answer 7

Molecular ion -> Charged fragment ion + radical

Question 8

What is detected by the mass spec?

Answer 8

The positive ions

Question 9

What is not detected by the mass spec?

Answer 9

The radical

Question 10

What is the largest peak?

Answer 10

The most significant fragment ion

Question 11

What does infrared radiation cause?

Answer 11

Covalent bonds to vibrate more and absorb energy