Unit 2: Modern Analytical Techniques

Question 0

What does the amount of vibration from absorption if infrared radiation depend on?

Answer 0

• bond strength
• bond length
• the mass of each atom involved in the bond

Question 1

What does the absorption of infrared radiation cause?

Answer 1

It causes covalent bonds to vibrate with either a stretching or bending motion.

Question 2

What do modern breathalysers measure?

Answer 2

Ethanol in the breath using infrared spectroscopy

Question 3

What are the uses of mass spectrometry?

Answer 3

• determining relative isotopic masses

- a method for identifying elements (use in the Mars space probe and in monitoring levels of environmental pollution