課程名稱︰普通化學乙
課程性質︰系定必修,外系可當通識
課程教師︰牟中原
開課學院：工學院
開課系所︰材料系
考試日期（年月日）︰2007/04/17
考試時限（分鐘）：120分鐘
是否需發放獎勵金：是!謝謝
（如未明確表示，則不予發放）
試題 :
Total points : 102
1. Which of the following solids are likely to be more soluble in acidic
solution, and which in basic solution? Which are likely to have a
solubility that is essentially independent of pH? Explain.(12%)
(a) C6H5COOH (b)BaCO3 (c) CaC2O4 (d) LiNO3 (e) CaCl2 (f) Sr(OH)2
2. In the titration of 20.00 mL of 0.500M CH3COOH by 0.500M NaOH, calculate
the pH of the solution at the points in the titration where (a) 7.45 mL
(b) 21.00 mL of 0.500M NaOH have been added.(CH3COOH Ka: 1.8 x 10^-5 )(15%)
3. Given that the vapor pressure of benzene and toluene at 100 ℃ the mole
fraction composition of (a) the benzene-toluene solution havin a normal
boiling of 100 ℃, and (b) the vapor in equilbrium with solution. (12%)
4. A sugar maple tree(楓樹) grows to a height about 15 meters, and its roots
are in contact with water in the soil. What must be the concentration of
sugar in the sap(楓樹漿) if osmotic pressure is the sole cause of forcing
sap to the top of tree at 280 K. The density of Hg is 13.66 g/cm3 and
density of sap is 1.10 g/cm3 (12%)
5. Limestone, CaCO3 is a water-insoluble materials whose solubility is affected
by acid-base equilbrium. Caves are formed when rainwater containing dissolved
CO2 passes over limestone for long period of time. Write chemical equations
for the formation of cave and 鐘乳洞.(15%)
6. (a) Belonging to the group 1 elements in qualitative analysis, there are
Pb(2+) and Ag(+) ions in a mixed solution, please indicate how they can be
separated and identified.(6%)
(b) Many elements form oxides. Identify 2 oxides that are basic, 2 oxides
that are acidic and 2 that are amphoteric.(6%)
7. Give a brief essay on each of the following problems:(24%)
A. Explain what is ideal solution both from the macroscopic and microscopic
point of views.
B. Explain the principles involved in fractional distillation. Draw a
diagram to illustate this.
C. Explain the diver diseasr after a diver diving to deep water and rising
too fast. How can it be prevented?
D. Please explain the order of acid strength in HI > HBr > HCl and how can
they be measured.
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