課程名稱︰普通化學甲下
課程性質︰化學系大一必修0
課程教師︰陸駿逸
開課學院：理學院
開課系所︰化學系
考試日期（年月日）︰09/06/19
考試時限（分鐘）：10:20-12:30 130分鐘
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
1.(10pts) Write down the definitions of
(i)Lewis acid/base,
(ii)Bronsted-Lowry acid/base
2.(10pts) Zinc oxide is amphoteric,
(i)Write the balanced chemical equation for its reaction with the HCl(aq)
(ii)Write the balanced chemical equation for its reaction with the NaOH(aq)
3.(10pts) Predict the relative magnitudes of the pKa's for carboxylic acid
CH3CH2COOH, a ketone CH3CH2COCH3, and an amide CH3CH2CONH2
4.(10pts) The cations in the solution which contains 0.10M Hg2(NO3)2 and
0.05M Pb(NO3)2 are to be separated by adding KI. Given that
Ksp(PbI2)=1.4*10^-8 and Ksp(Hg2I2)=1.2*10^-28. What is the optimized
concerntration of KI which will cause the Hg22+ to precipitate fully and
Pb2+ to remain almost entirely in the solution.
5.(15pts) Describe simply how does the action potential propagate.
6.(15pts) Compute the equlibrium constant for the reaction
Hg2+(aq)+Hg(l)→Hg22+(aq) where the following half reactions are given
2Hg2+(aq)+2e-→Hg22+(aq) ε0=0.905V Hg22+(aq)+2e-→2Hg(l) ε0=0.796V
7.(30pts) Van der Waals' equation(P+an^2/V^2)(V-nb)=nRT contains two parameters
a and b. Suppose that the molecule is of the spherical shape with the
size(radius) 3A.The molecules attraction has the range of 10A, and the
attraction potential energy is of the order of 10^-20J.
(i)Estimate the orders of the magnitude of a and b
(ii)Estimate the order of the magnitude of the critical temperature
(below which there is a liquid/gas transition)
8.(30pts) Consider the 2px 2py 2pz orbitals of the B atom in BH3. The three
functions form a three dimensional representation of the symmetry (sub)group
C3={E,C3,C3^2}.
(i)Write down the three matrices of the symmetry operations.
(ii)What is the character vector of this representation?
(iii)With the proper combination of the orbitals, one can reduce it to several
irreducible representations. Decompose the character vector into the
contributions from the irreducible representations to determine whether
it contains the (one dimensional)E representation with the character
(1,ε,ε*)(Here ε=exp(2iπ/3).)
(iv)Use the projection operator th find out the function (as the linear
combination of 2px 2py 2pz) which forms this representation.
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◆ From: 140.112.239.36
※ 編輯: waynewong49 來自: 140.112.239.36 (06/20 17:04)