课程名称︰分析化学丁 课程性质︰必修 课程教师︰林万寅 开课学院：生农学院 开课系所︰园艺系 考试日期（年月日）︰20140109 考试时限（分钟）：110分钟 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : 1.H3PO4 is a triprotic acid with pK1=2.00,pK2=7.00,pK3=12.00.Find the pH value of the followinf solutions. (A)0.01M Na2HPO4. 5% (B)Mix 40mL,0.045M H3PO4 with 60mL,0.050M NaOH. 5% (C)A solution with [H3PO4]=[PO4-3]. 5% (D)A solution with [H2PO4-]/[PO4-3]=0.10 5% 2.A 20.0mL 0.200M Ca+2 solution buffered at pH9.0 (αy=0.050) was titrated with 0.0200M EDTA. Kf(ZnY)=5.0x10^10 (A)Find pCa at the equivalence point. 5% (B)Find pCa after addition of 30.0mL EDTA. 5% 3.A solution of Sn+2 (40mL,0.010M) was titrated with 0.020M Ce+4 in 1 M H2SO4. [Ef(Ce+4→Ce+3)=1.44V;(Sn+4→Sn+2)=0.77V] (A)Calculate the electrode potential after addition of 30.0mL Ce+4. 5% (B)Calculate the electrode potential after addition of 40.0mL Ce+4. 5% 4.Cell Pb(s)│PbF2(s)│F-(0.020M)││Cl-(0.01M)│AgCl(s)│Ag(s) develops a potential of 0.568V(E。=-0.126V for Pb→Pb+2,0.222V for AgCl→Ag + Cl-) (A)Write a balanced cell reaction and find its standard cell potential. 5% (B)Find the equilibrium constant for the cell reaction in A. 5% (C)Find the Ksp for PbF2. 5% 5.The following chromatogram shows three bands for the mobile phase(M), solute A and solute B passing through a 25.0cm column. If the base widths (W) for bands A and Bare 1.26and 1.42 mins,respectively, answer the following questions. (图形题) (A)Calculate the capacity (retention) factor (ka) for the solute A. 3% (B)Find the selectivity factor (α) and resolution (Rs)for bands A and B 6% (C)Calculate the plate height (H) plate count (N) for solute A. 6% 6.Answer the following questions. (A)Describe the acid error and the alkine error of a pH glass electrode. 4% (B)Describe the anodic stripping voltammetry. 4% (C)Describe fluorescence & photomultipiler tube. 4% (D)Describe the principle of a photomultiplier tube. 4% (E)Define the inner-filter effect (primary & secondary absorption) 4% (F)Find the percentage of transmitted light at 450nm for 0.30ppm β-carotene ( C40H56;ε450 = 8200 M^-1˙cm^-1;b = 1.0cm) solution. 5% (G)Describe the components for a spectrofluorometer. 5% --

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