Analytical Techniques

Question 1

How can infrared spectroscopy show how none of a substance is present (2)

Answer 1

• No peak in the infrared spectrum (1)
• Refer to the substances functional group (1)

Question 2

One advantage and two disadvantage of infrared spectroscopy? (3)

Answer 2

• More sensitive than chemical test (1)
• Infrared spectroscopy requires special laboratories (1)
• Identifies functional group but not position in molecule (1)

Question 3

How do you find the relative molecular mass on a mass spectrum? (1)

Answer 3

• Peak furthest to the right (1)

Question 4

How do you determine the order of functional group? (1)

Answer 4

• First functional group will be further right (1)