课程名称︰普通化学上 课程性质︰大一共同必修科 课程教师︰郑淑芬 开课学院：工学院 开课系所︰化工系 考试日期（年月日）︰2008/10/24 考试时限（分钟）：两节课 是否需发放奖励金：当然要咧! （如未明确表示，则不予发放） 试题 : 1. Write the correct chemical formulas to distinguish between (a)sodium carbonate and sodium hydrogen carbonate (b)aluminum nitride and aluminum nitrite (c)potassium chlorate and aluminum nitrite (d)chlorous acid and hydrosulfuric acid (15%) 2. Name the following compounds: (12%) (a)P2O5 (b)Mg(OH)2 (c)CuSO4˙5H2O (d)Hg2Cl2 (e)FeI3 3. What is the maximum number of electrons that can have the following quantum numbers? Also,show the (n,l,ml,ms) numbers for all the electrons to account for your answers. (a)n=1,l=1 (b)n=3,l=1 (c)n=2,l=2,ml=-1 (d)n=3,l=2,ms=1/2 (e)n=1,l=0,ms=-1/2 (10%) 4. (i)Name the following elements,show (ii) the electron configuration, and give (iii) the four quantum numbers in the form of (n,l,ml,ms) for the electron in the highest occupied orbital of each of them. (a)Ba (b)Ti(3+) (c)Ag (9%) 5. Naturally occurring strontium consists of the following four isotopes. The atomic mass of strontium is 87.62. Calculate the percent abundance of Strontium=88 (5%) --------------------------------------------------------------------------- isotope Atomic mass, u Percent abundance(%) --------------------------------------------------------------------------- Strontium-84 83.913 0.5612 Strontium-86 85.909 9.8633 Strontium-87 86.909 x Strontium-88 87.906 y --------------------------------------------------------------------------- 6. The ionization energy of hydroden is 13.6ev. It requires 186 kJ/mol to eject electrons from sodium metal (a)What is the effective nuclear charge(Zeff) for this electron in sodium? (b)What is the minimum frequency of light necessary to emit electrons from sodium via the photoelectric effect? (c)If sodium is irradiated with light of 212nm,what is the maximum velocity of the emitted electron? (d)What is the wavelength of the matter wave of this emitted electron? (12%) 7. Describe the contribution of the following scientists and give the representative equations in understanding the atomic structure. (9%) (a)Louis de Broglie (b)Werner Heisenberg (c)Erwin Schrodinger 8. Predict the number of total nodal planes, the radial nodes, and the angular nodal surfaces of the following orbitals: (a)3p (b)3d (c)4f (d)4s (12%) 9. (a)Write the possible Lewis structures for (i) cyanate ion(O-C-N)- and (ii) fulminate ion(O-N-C)-. Indicate which of these Lewis structures is most important for each ion, and explain. (b)The fulminate ion is unstable, and its salts are friction-sensitive explosives. Give possible explanation based on the Lewis structure. (10%) 10. Show the Born-Haber cycle and complete the following table(all values are in kilojoules per mole). (10%) ------------------------------------------------------------------------ Compound ΔH°f 1st I.E. 2nd I.E. ΔH°f 1st E.A. 2nd E.A. U(lattice) ΔH°f (MmXn) (M,g) (M) (M) (X,g) (X) (X) (MmXn) (MmXn,s) Na2O 108 494 2185 249 141 26 a -409 CaCl2 368 654 1352 122 349 -85 2244 b ------------------------------------------------------------------------ 11. The energy levels of a particle of mass m confined to a 2-D square box of side L are E = (h^2/8m)[(Nx^2 + Ny^2)/L^2] (a)Write expressions for the energies of the three lowest levels. Which of these levels are degenerate? (b)It is approximated a square quitar with a side of 30cm. Assuming a nitrogen molecule as a point mass, what is the wavelength of the energy does a nitrogen molecule inside the square guitar need to be excited from the lowest energy level to the second energy level? Useful information: gas constant, R = 0.08206 atm L mol^(-1)k^(-1) = 8.314 J*mol^(-1)*K^(-1) Avogadro constant NA = 6.022 * 10^23 /mol Planck's constant, h= 6.626 * 10^(-34) J*s = 6.626 * 10^(-27) erg.s 1 atm = 760 mmHg = 760 Torr 1 eV = 96.487 kJ/mol Speed of light,c = 2.9979 * 10^8 m/s Mass of electron = 9.109 * 10^(-31) kg Atomic mass: H = 1.00 He = 4.00 C = 12.01 N = 14.01 O = 16.00 Ne = 20.18 Na = 22.99 Mg = 24.31 -- 一年前我在巨匠学电脑 现在在男一舍当宅男 我的专业---- 来自巨匠 --

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