Lecture 4 - monitoring techniques

Question 1

how to determine the concentrations of reactants/products

Answer 1

1. mix reactants, stop/quench reaction, remove products from reactor for analysis
2. real time, in situ analysis (without reactor)

Question 2

examples of in situ analysis

Answer 2

spectroscopy (light absorption)

Question 3

examples of analysis where you remove products

Answer 3

gas chromatography
mass spectrometry
titration
wet chemical analysis

Question 4

what is spectroscopic detection

Answer 4

shine light through sample

calculate the absorbance using the beer-lambert law

Question 5

beer lambert law equation

Answer 5

I = I0 exp (-sigma C l)
C = concentration of molecules
l = path length
sigma = molecular absorption
these all are absorbance

Question 6

what does diagram of stirring reactor look like

Answer 6

tube introducing reactants
tube taking products from same jar
stirrer
quenching analysis