課程名稱︰無機化學一 課程性質︰化學系大三必修 課程教師︰林英智 開課學院：理學院 開課系所︰化學系 考試日期（年月日）︰2014/01/09 考試時限（分鐘）：120 是否需發放獎勵金：是 （如未明確表示，則不予發放） 試題 : 1. The Latimer diagram of the oxidation/reduction of Mn in acidic condition is shown below: - 0.56 2- 2.27 0.95 3+ 1.51 2+ -1.18 MnO4 ——→ MnO4 ——→ MnO2 ——→ Mn ——→ Mn ——→ Mn 3+ Caculate the reduction potential Mn → Mn and plot the Frost diagram under both neutral and basic condition for Mn. 2. The boiling points of methanol and cyclohexane are 64.7 and 80.7℃ and their heats of vaporization are 34.9 and 30.1 kJ/mol, respectively. Determine the entropy of vaporization for these liquid and explain the difference between them. 3. The bond angles for OF2 and H2O are 103°and 104.5°, respectively. The dipole moments are 0.30D and 1.85D, respectively. Explain the factors that cause such a large difference in the dipole moments of the molecules. 4. Ammonium chloride is observed to undergo abrupt change in heat capacity at some temperature below the melting point. Describe the processes likely responsible for these observations. 5. The length of the edge of the units cell for Na2O, which has the antiflourite structure, is 555pm. For Na2O, determine the following: (a)The minimum distance between Na ions. (b)The minimum distance between oxide ions. (c)The minimum distance between Na and oxide ions. (Note: Flourite structure of CaF2 is a fcc arrangement of Ca with complete filled tetrahedral hole by F.) + 6. Explain why there are no hydride complexes of the type CO(NH3)5H , but there are some like Mn(CO)5H + 2+ 2+ 7. The radii of Li , Mg and Ca ions are 60, 65 and 94 pm, respectively. + 2+ 2+ The hydration number of Li , Mg and Ca ions are 5, 10 and 7 approximately, explain 8. Acetic anhydride is assumed to undergo slight autoionization. (a)Write the equation to represent the autoionization process. (b)What is one substance that would be acidic in this solvent? (c)What is one substance that would be basic in this solvent? 2+ (d)Write the equation to show the amphoteric behavior of Zn in liquid acetic anhydride. 9. Tetrahedral hole is formed when four spheres of radius r are in contact and are placed at alternate corners of a cube. The hole is inside the middle of the cube. Find the length of the body diagonal of this cube and the radius of the tetrahedral hole. 10.Arrange and explain the relative acidity of the following acids: H2SO4, HSO3F, HSO3F + SbF5, and draw their structures. --

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