[試題] 95下 陳逸聰 普通化學乙 期末考

[blackpanther (黑蟠桃)]

課程名稱︰普通化學乙
課程性質︰必修
課程教師︰陳逸聰
開課學院：工學院
開課系所︰土木系
考試日期（年月日）︰2007/06/22
考試時限（分鐘）：三小時
是否需發放獎勵金：是
（如未明確表示，則不予發放）

試題 :

1.Use the VSEPR model to predict the geometries of the following ions/molecules

  (10%)

(a)(NO2)-

(b)BrF5

(c)PF5

(d)(IF4)-

(e)(H3O)+


2.LiI(s) has a heat of formation of -272kJ/mol and a lattice energy of

  -753kJ/mol. The ionization energy of Li(s) is 520kJ/mol, the bond energy of

  I2(s) is 151kJ/mol, and the electron affinity of I(g) is -295kJ/mol. Use

  these data to determine the heat of sublimation of Li(s). (5%)


3.In valence bond theory, the linear combinations of the 2s and 2p orbitals

  gives four sp3 hybrid orbitals, as

  Φ1 = 0.5[s＋px＋py＋pz]

  Φ2 = 0.5[s＋px－py－pz]

  Φ3 = 0.5[s－px＋py－pz]

  Φ4 = 0.5[s－px－py＋pz]

(a)Show that these four sp3 hybrid orbitals are normalized. (4%)

(b)Prove that every one of these four sp3 orbitals is orthogonal to any of the

   others. (3%)

(c)Illustrate the orientations and shapes of these four sp3 hybrid orbitals.

   (4%)


4.Use molecular orbital theory to find (i) electron configurations, (ii) bond

  orders, and (iii) para- or dia- magnetic properties of the following ions/

  electrons. (18%)

(a)(C2)+

(b)O2

(c)BN


5.Please answer following questions:

(a)If the force constant of N(14)O(16) is 1550N/m, determine the wave number of

   a line in the infrared spectrum of NO. (5%)

(b)Draw the idealized NMR spectra for the following compounds. (8%)

(i)Assume the five hydrogen atoms in the benzene ring are equivalent with no

   spin-spin coupling.

(ii)

(iii)

(c)The microwave sspectrum of H(1)Cl(35) shows that the transition from J = 0

   to J = 1 requires electromagnetic radiation with a wavelength of

   4.85×(10^-4)m. Calculate the bond length of the HCl molecule. (The masses

   of H(1) and Cl(35) are 1.0078amu and 34.9689amu, respectively.) (5%)


6.Calculate (i) atoms per unit cell, (ii) coordination number, and (iii) the

  percentage of space occupied by spheres in

(a)Simple cubit crystal system

(b)Body-centered cubic crystal system

(c)Face-centered cubic crystal system (15%)


7.Amino acids can act as ligands toward transition metal ions. The simplest

  amino acid is glycine NH2CH2CO2H.

(a)Draw a structure of the glycinate anion, (NH2CH2CO2)-, acting as a bidentate

   ligand. (2%)

(b)Draw the structural isomers of the square planar complex Cu(NH2CH2CO2)2.

   (4%)


8.Draw all the geometrical isomers of Pt(CN)2Br2(H2O)2. Which of these isomers

  has an optical isomer? Draw the various optical isomers. (6%)


9.The complex ion (PdCl4)2- can be tetrahedral or square planar.

(a)Draw the crystal field diagram of (PdCl4)2- for each of the two possible

   structures. (6%)

(b)Predict the magnetic property (paramagnetic or diamagnetic) of (PdCl4)2-

   for each of the two possible structures. (2%)

(c)We know (PdCl4)2- is diamagnetic. What is the structure for (PdCl4)2-? (2%)


10.Why are (CN)- and CO toxic to humans? (4%)


第五題(b)的三個子題的圖分別為Zumdahl的Chemical Principles, 5th edition中第14章

習題第46題的(a)(b)(c)小題的圖

--
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