CCM2020Fall

Mention three instruments which can be used as both qualitative and quantitative analysis. (30 sec, 5 points)

Which one is better? an instrument with high accuracy but low precision or the one with high precision but low accuracy. Explain your opinion. (2 min, 15 points)

What is spectroscopy? (60 sec, 10 points)

What is the purpose of AAS characterization? How about the limitation? (2 min, 10 points)

There are several options of excitation source in AES, explain the comparation. (2 min, 10 points)

The table shows the relationship between the absorbance of a solution and its concentration given a pathlength of 0.7 cm.

[a] What is the absorbance when the concentration is 0.8 M?

[b] What is the concentration if the absorbance is 0.605?

(3 min, 15 points)

Identify each part of the scheme of spectrophotometer. (60 sec, 5 points)

Which material is expected to absorb light with higher wavelength? Why? (3 min, 10 points)

Why sometimes FTIR give a very broad peak? Where is it come from? (3 min, 10 points)

Which molecule is the FTIR spectra belong to? Explain your argument. (3 min, 20 points)