推 jew710934 :同系推 學弟不是禮拜五要考現在還來PO考古XD 01/10 01:34
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※ 編輯: retan 來自: 1.162.242.63 (01/10 20:36)
課程名稱︰普通化學一
課程性質︰必修
課程教師︰周必泰
開課學院：理學院
開課系所︰化學系
考試日期（年月日）︰2012/4/14
考試時限（分鐘）：110
是否需發放獎勵金：是
（如未明確表示，則不予發放）
試題 :
滿分155
(60) 1. Explain the following definition and questions.
a. Name the following compounds (2 points each, 20):
(a). KHCO3, (b). HNO2 (c). KMnO4, (d). NaClO, (e). NaClO4, (f). GaN, (g).
CoI2, (h).(有刻度)量筒, (i).拋棄式滴管, (j) 滴定管
b. Write formulas for the following compounds. (2 points each, 20)
(a) potassium hydrogen sulfite (b) lithium nitride (c) sodium hydride (d)
aluminium sulfate (e) hypobromous acid (f) Gypsum (g) lime stone (h) ammonium
hydrogen phosphate (i) laughing gas (j) Tin (IV) fluoride
c. Write down symbol and full name of 3A family (in English, starting from硼)
(5)
d. Write down symbol and full name of the alkali metal in English (5)
e. Please list three major sources for the cause of acid rain (5)
(20) 2. (連連看) Please connect the chemist/physicist listed in the left side
to his/her achievement or related honor listed in the right side (一對一). (2
points each, 20)
a. Joseph Priestley 1.e/m =-1.76 x 108 C/g
b. Antoine Lavoisier 2. Who wrote the first chemistry book
c. John Dalton 3. V is proportional to n at constant T and P
d. Louis Gay-Lussac 4. Who named ‘photon’
e. Amedeo Avogadro 5. The highest arward from American Chemical Society
f. Robert Boyle 6. Holding an ascent record of 4 miles for 50 years
g. J. J. Thomson 7. Law of definite proportion
h. G. N. Lewis 8. Conductivity of electrolytes in solution
i. Svante Arrhenius 9. The father of modern chemistry
j. Jacques Charles 10. Absolute temperature
11. Atomic theory
12. The discovery of nucleus
(10) 3.
a. Balance the following oxidation-reduction reaction, which occurs
in acidic solution, using the half-reaction method (5).
CH3OH(aq)+Cr2O72-(aq) -> CH2O(aq)+Cr3+(aq)
b. Similar to the above statement except that the reaction takes place in
basic solution (5).
MnO4-(aq)+S2-(aq) -> MnS(s) + S(s)
(10) 4.
A 50.00-ml sample of solution containing Fe2+ ions is titrated with a
0.0216 M KMnO4 solution. It required 20.62 ml of KMnO4 solution to oxidize
all the Fe2+ ions to Fe3+ ions by the reaction (Chapter 4, exercise 76,
similar to 75 that was assigned)
MnO4-(aq) + Fe2+(aq) ---acidic---> Mn2+(aq) + Fe3+(aq) (Unbalanced)
a. What was the concentration of Fe2+ ions in the sample solution? (5)
b. What volume of 0.0150 M K2Cr2O7 solution would it take to do the same
titration? The reaction is
Cr2O72-(aq) + Fe2+(aq) ---acidic---> Cr3+(aq) + Fe3+(aq) (Unbalanced) (5)
(20) 5.
(a) The distribution of velocities of the particles in an ideal gas
is described by the Maxwell Boltzmann distribution law
f(u)= 4*pi* (m/(2*pi*kT))^3/2 * u^2 * e^(-mu^2/2kT)
where u = velocity in m/s
m = mass of a gas particle in kg
kB = Boltzmann’s constant = 1.38 x 10-23 J/K
T = temperature in Kelvin
Derive the most probable velocity ump for He (atomic mass = 4g) (5 points)
(b) At a certain temperature, the probability that a gas particle has the
most probable velocity is equal to one-half the probability that the same gas
particle has the most probable velocity at 300 K. Is the temperature higher
or lower than 300 K? Calculated the temperature (10, Chapter 6 exercise 135)
_
(c) Given _ the number of collisions per unit time,Z as Z = 2^(1/2)*σ*c*P/kT
where c is the mean speed. Accordingly, the mean-free path入
(distance/collision) can be expressed as (5 points)
a. √2*σ/kT, _ b. kT/√2 , _ c. kT/√2*σ*P,
d. √2*σ*P*c e. kT/ √2*c
(20) 6. For the van-der Waals equation of the real gas
Pobs = nRT/(V-nb) - a(n/V)^2
(a) Please define van-der Waals constants a and b (5)
(b) For the following gases, write down the order of van-der Waals constant a
from the smallest value. (5)
H2, He, CH4, N2, H2O, NH3
(c) At higher pressure such as > 1000 atm pressure calculated from the
van-der Waals equation shows significant deviation from the observed one.
Give a reasonable explanation. (5)
(d) Give any possible reason why the b value for He is larger than that of Ne(5)
(20)7.
(a) Bacterial digestion is an economical method of sewage treatment.
Please balance the reaction (10) (Chapter 3, exercise 68)
CO2(g) + NH4+(aq) + O2(g) ->C5H7O2N(s) + NO2-(aq) + H2O(l) + H+(aq)
(b) Vitamin A has a molar mass of 286.4 g and has a general molecular
formula of CxHyE, where E is an unknown element. If vitamin A is 83.86% C and
10.56% H by mass, what is the molecular formula of vitamin A. (10)
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