Laboratory experiment

Question 1

Explain NMR spectroscopy

Answer 1

1.

Question 2

What is spectroscopy?

Answer 2

1. The study of the interaction between matter and the electromagnetic radiation.
2. It is used to study the Internal structure of matter (intermolecular structure of matter) especially molecules of complex organic or inorganic compounds.

Question 3

What are the two ways that electromagnetic waves can interact with mater?

Answer 3

1. Absorption : electrons absorb energy from electromagnetic waves and jump to an excited stte (another n shell closer to the nucleus, lower in number ).
2. Emission: when electrons jump from the excited state to the ground state ( n shell larger in number because it is farther away from the nucleus) and they release radiation (light or photon)

Question 4

Explain Infrared light (IR) spectroscopy

Answer 4

1. HELP MEASURE THE INTERMOLECULAR STUCTURE OF A MOLECULE
2. You have a reaction and make a molecule and you want to find what the molecule is you can use IF spectroscopy
3. Set up:
   
   1. radiate a sample with infrared light
   2. Some of the light will be absorbed by the molecules and some will emit on a detector
4. Absorption:
   
   1. the light absorbed can make the molecules radiate (vibrate) in various ways specifically when they are radiated with a specific wavelength of infrared light.
      
      1. Asymmetric : bending of covalent bonds or extending of bonds
      2. Symmetric: bending of covalent bonds or extendins of covalent bonds.
   2. The vibration above will occur at very particular energies (a very specific infrared light is absorbed) and the motions of radiation will vary depending on the functional group, because the identity of the atom affects the photon that is absorbed.

Question 5

Explain the concept of mass spectroscopy?

Answer 5

1. Measures intermolecular properties
2. Goal: you want to find out what isotope percentage of a molecules is most found in nature
3. Set up
   
   1. Take a sample
   2. vaporize it and ionize it ( divide the molecules into various charge particles)
   3. you smash it into a device
   4. you let the smash part run through a magnetic field
   5. the field will bend the different ionize particle differently
      
      1. the smaller particle would be more ( less work to bend them)
      2. larger particles would be bend less ( less work
   6. You place into a graph and use the graph to let you know which type of isopote is more prominent
4. Results: givs you a better insight into which ions in the molecule is more stable