課程名稱︰普通化學(丙) 課程性質︰森林系/心理系必修 課程教師︰蔡蘊明 開課學院：理學院 開課系所︰化學系 考試日期（年月日）︰2016/06/22 考試時限（分鐘）：120分鐘 試題 : ※註: 第六題有誤, 不應使用HCl滴定, 該題送分 ================================================================================== R = 0.08206 liter．atm．K^-1．mol^-1 = 8.3145 J．K^-1．mol^-1; Kw = 1.00*10^-14; ln(x) = 2.303*log(x); F = 96500 C/mol 1. Name the following coordination compounds. (a) [Co(NH3)6]Cl2 (b) K4[PtCl6] (c) Na4[Fe(CN)6] (6%) 2. Give formulas & structures for the following. (a) trans-diaquabis(ethylenediamine)copper(II) ion (b) potassium tetrachlorocobaltate(II) (4%) 3. The mechanism for the gas-phase reaction of nitrogen dioxide with carbon monoxide to form nitric oxide and carbon dioxide is thought to be: k1 NO2(g) + NO2(g) --------> NO3(g) + NO(g) k2 NO3(g) + CO(g) --------> NO2(g) + CO2(g) (a) Use steady state approximation to derive the rate law. (7%) (b) From the rate law derived in (a) which step should be the slowest step? Explain. (3%) 4. A first-order reaction has rate constants of 4.6*10^-2(s^-1) & 8.1*10^-2(s^-1) at 0 ℃ and 20 ℃, respectively. What is the value of the activation energy? (10%) 5. Arsenic acid (H3AsO4) is a triprotic acid with Ka1 = 5.5 x 10^-3, Ka2 = 1.7 x 10^-7, and Ka3 = 5.1 x 10^-12. Calculate [H+], [H3AsO4], [H2AsO4-], [HAsO42-], and [AsO43-] in a 0.20 M arsenic acid solution. (10%) 6. A 0.20 M arsenic acid solution (20.0 mL) is titrated with a 0.10 M HCl solution. (a) Determine the pH of the second equivalence point. (4%) (b) Determine the pH of the third equivalence point. (6%) 7. Draw all the geometrical isomers of Cr(en)(NH3)2BrCl+. Which of these isomers also have an optical isomer? (10%) 8. The complex [Fe(H2O)6]2+ is paramagnetic. Is the H2O ligand inducing a strong or weak field? Draw the octahedral crystal field splitting diagram for the metal ion to justify your answer. (4%) 9. Draw the d-orbital splitting diagram for the octahedral complex ions of Co2+ in high and low spin. (6%) 10. Knowing the following standard potential: O2 + 4H+ + 4e- -> 2H2O ξ°= 1.23 V 2H2O + 2e– -> H2 + 2OH- ξ°= -0.83 V Calculate the potential for the electrolysis of neutral water. (Show the detail of your calculation) (10%) 11. For neuron(神經) cells, the intracellular concentration of Ca2+ is 0.10 μM whereas the extracellular concentration of Ca2+ is 1.2 mM. What would be the membrane potential, ξCa2+, across a neuron cell membrane be if Ca2+ were the only ion to be considered? (Assume a body temperature of 37℃.) (10%) 12. Calculate [H+] of a 0.200 M solution of NH4CN. (Ka (NH4+) = 5.6*10^-10 ; Kb (CN-) = 1.6*l0^-5) (10%) --

※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 140.112.247.229 ※ 文章網址: https://webptt.com/m.aspx?n=bbs/NTU-Exam/M.1466773583.A.8A9.html ※ 編輯: qtm0981 (140.112.247.229), 06/24/2016 21:13:38