Analytical techniques

Question 1

What is infrared spec

Answer 1

Where different bonds absorb different frequencies of IR radiation which increases its vibrational energy, the percentage of IR radiation transmitted at each frequency is plotted

Question 2

What is mass spectrometry

Answer 2

Sample bombarded with electrons and molecular ion is formed as the molecule loses an electronW

Question 3

What is on the X and Y axis of the mass spec graph

Answer 3

Y axis is % abundance and X is the m/z ratio

Question 4

How can you determine the Mr from a Mass spec graph

Answer 4

The highes on the m/z scale ignoring M+1

Question 5

What is the method to figuring out a molecule using both techniques

Answer 5

1. Use the composition to work out the empirical formula
2. Use mass spec to wowk out the MR using the empirical formula to check
3. Work out the functional groups in the compound
   4.Then use mass spec fragments to piece together the actual molecule