課程名稱︰分析化學乙 下
課程性質︰必修
課程教師︰林萬寅
開課系所︰醫技系
考試時間︰2006.04.18 (二)
是否需發放獎勵金：是
試題 :
1. Explain the following terms.
(a)isosbestic point (b)chemiluminescence (c)excitation spectrum
(d)Doppler broadening (e)Scatchard plot (f)atomic emission
(g)fluorescence quenching (h)Beer's law (i)atomization
2. Answer the following questions.
(a)Describe the principle of operation for a photomultiplier tube
(b)Describe the principle of operation for a hollow cathode lamp
(c)Describe the principle of a Fourier transform infrared spectrometer
(d)Describe the method of continuous variation to determine the
stoichiometry of a metal complex.
3. A stock solution was prepared by dissolving 0.065g of an known compound X
in a 100-ml volumetric flask. A 1.0ml aliquot was withdrawn, placed in a
10-ml volumetric flask,and diluted to the mark. The resulting solution
gave a transmittance at 340nm of 40% in a 2.0-cm cuvet. The molar
absorptivity for compound X at 340nm is 800 M^-1．cm^-1.
(a) find the concentration of X in the 100-mL flask.
(b) find the molecular weight of compound X.
4. The absorbances for 1.00x10^-4 M MnO4-, 1.00x10^-4M Cr2O72-, and an unknown
mixture of the two compounds (all in a 1.0-cm cell) are given below. Find
(a) the molar absorptivities for both species
(b) tje concentrations for the two compounds tn the mixture.
Wavelength (nm) MnO4- standard Cr2O72- standard Mixture
266 0.042 0.410 0.766
320 0.168 0.158 0.422
5. Answer the following questions concerning a diffraction grating.
(a)with a resolution of 10000, how close in cm^-1 is the closest line to 400nm
that can barely be resolved?
(b)calculate the second-order resolution of a grating that is 5.0cm long and
is ruled at 500 lines/mm.
(c)find the angular dispersion (Δψ;in degrees) between 400.0 and 400.5 nm
for second-order diffraction from a grating with 250 lines/mm and φ=5.0˙
6. Answer the following questions according to the energy diagram below.
(a)describe the processes for B~I
(b)if the rate constants (in 1/S) for D, E, and F are 5*10^8, 3*10^8 and
2*10^8, respectively, find the lifetime and quantum yield for the
fluorescence.
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