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Organic chemistry: Mass Spectrometry Activity

Complete the following activity. follow the directions and answer all the questions accordingly

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Page| 1Mass Spectrometry ActivityNote: Refer to Chapter 12in your McMurraytextbook1. True or False. Both Mass Spectrometry and Infrared Spectroscopy involve the interaction of molecules with electromagnetic radiation.2. What is the purpose of Mass Spectrometry?The most common method of ionizing molecules is by electron impact (EI). The sample is bombarded with a beam of high energy electrons (1600 kcal or 70 eV). EI usually causes an electron to be ejected from the molecule. 3. What is a radical cation?4. How does the mass of the radical cation compare to the original molecule?5. If the radical cation remains intact, it is known as the molecular ion (M+•) or parent ion. Often, the molecular ion undergoes some type of fragmentation. WHY?Page| 2The resulting fragments may undergo even further fragmentation:6. The ions are deflected by a magnetic field. Which of the above fragments is an ion?7. What happens to the other fragment? 8. Which fragment reaches the detector?9. Explain the units on the x and y axes for the mass spectrum for methane shown below.10. The base peak is the tallest peak in the spectrum. Label the base peak above.

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