课程名称︰普通化学一上 课程性质︰化学系必带 课程教师︰陆骏逸 开课学院：理学院 开课系所︰化学系 考试日期（年月日）︰2014/01/08 考试时限（分钟）：120 是否需发放奖励金：是 （如未明确表示，则不予发放） 试题 : ======================================================================== General Chemistry 1 2014/01/08 F I N A L E X A M 1. (10 pts) Write down the chemical formula of the following compounds. a. Triaquabromoplatinum(II) fluoride b. Potassium hexacyanovanadate(III) c. 4-Ethyl-2-heptyne 2. (15 pts) The molecular orbital theory (MO) and the valence bond theory have different predictions for the magnetic property of O2 molecules. Explain their predictions. Which one is correct? 3. (15 pts) Consider the MO of a homonuclear diatomatic molecule. Let HAA = HBB = -3eV, HAB = -1eV, SAB =0.1 Calculate the two MO energies. 4. (10 pts) According to Pauli, what is the relation between the particle spin and the exclusion principle? 5. (10 pts) A helium atom is excited to have the electron configuration 1s12s1 where one electron is in 1s wave function φ1s(r) and the other electron is in 2s wave function φ2s(r). Write down the (space part) of the two electron wave function ψ(r1,r2) for the singlet and tje triplet states. Which one should have a lower energy? Why? (编注：φ是phi, ψ是psi) 6. (10 pts) What is the basic idea of hard/soft acid/base and why is it useful? Give at least one example for each of these four typical classes. 7. (20 pts) Use the simplest MO to calculate the π system MO of C5H5. Assume that α = HAA are all the same for A =1,2,3,4,5 where A is the label for the carbon atoms, β = HAB fpr the neighboring carbons, and the neglect the overlap integral and the other HAB. (1) Calculate the MO energies. (2) Calculate the wave functions of the MO. (3) Plot the wave functions. 8. (10 pts) In the aqueous solutions, ions like Cu2+ or Ni2+ have deep colors whereas Zn2+ is transparent. What makes such differernt light adsorption properties? 9. (15 pts) In the transition metal complex of Cr3+, some ligands like Br- are π donors whereas some ligands like CO are π acceptors. Draw an energy diagram to explain the origin of the different behaviors. ================================================================= --

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