[試題] 100下 何國榮 分析化學乙下 期中考
課程名稱︰分析化學乙下
課程性質︰必修
課程教師︰何國榮
開課學院：生命科學院
開課系所︰生技系
考試日期（年月日）︰2012.04.27
考試時限（分鐘）：120分鐘
是否需發放獎勵金：是，謝謝
（如未明確表示，則不予發放）
試題 :
1. Explain that high resolution mass spectrometry produces lower detection
limit than low resolution mass spectrometry.(6%)
2. Describe the reason(s) that professor John B. Fenn was awarded Nobel prize
in chemistry.(8%)
3. Describe the working principle of FT-IR.(8%)
4. Explain the effect of kinetic polarization in voltammetry.(6%)
5. Describe the real limitations to Beer's Law.(6%)
6. Draw the curve of potential and current vs. time during a controlled
potential electrogravimetry.(6%)
7. Explain the reason of adding unmeasured excess of Ce+4 in the coulometric
titration of Fe2+.(5%)
8. Explain the working principle of amperometric titration.(6%)
9. In voltammetry why large amount of supporting electrolyte is added to
sample solution?(6%)
10.Explain the advantages of differential pulse polarography in comparison
with linear scan direct current polarography.(8%)
11.Draw the current-potential curve of electrolysis and explain the voltage
behavior at different currents.(8%)
12.Distinguish between a limiting current and a diffusion current.(5%)
13.The following reaction is reversible and has a half-wave potential of
-0.349 V when carried out at a dropping mercury electrode form a solution
buffered to pH 2.5.(Assume that the diffusion coefficient for O and R are
approximately the same)
→
O + 4H+ + 4e- R
←
Predict the half-wave potential at pH:(a)1.0; (b)3.5; (c)7.0 (9%)
14.List the advantages and disadvantages of the dropping mercury electrode
compared with platinum or carbon electrodes.(6%)
15.Describe the differences between the following and list and particualr
advantages possessd by one over the other.(12%)
(a) Filters and monochromators as wavelength selectors
(b) Solid-state photodiodes and phototubes as detectors of electromagnetic
radiation
(c) Phototubes and photomultiplier tubes
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