大学MOOC Inorganic and Analytical Chemistry(Northwest A&F University)1461586173 最新慕课完整章节测试答案
Absorbance Photometric Analysis
文章目录
- Absorbance Photometric Analysis
- Acid-base Equilibrium and Acid-base Titration
- Coordination Compound and Coordination Titration
- Introduction to Analytical Chemistry
- Introduction to The Structure of Matter
- Potential Analysis
- Precipitation-dissolution Equilibrium and Precipitation Titration
- REDOX Reaction and REDOX Titration
- Solutions and Colloids
- The Energy and Direction of a Chemical Reactions
- The Rate and Limitation of Chemical Reactions
Unit test
1、单选题：
κ of a absorbing complex is always dependent upon the
选项：
A: The stability of the complex
B: The thickness of the complex
C: The wavelength of the electromagnetic radiation
D: The concentration of the complex
答案: 【 The wavelength of the electromagnetic radiation】
2、单选题：
The Lambert-Beer’s Law can NOT be represented by
选项：
A: -lgIt/I0 =κbc
B: lgIt/I0 =κbc
C: lg1/T = κbc
D: A = κbc
答案: 【 lgIt/I0 =κbc】
3、单选题：
The % T of a certain solution at a certain wavelength in a 1.0 cm cell is 50%. the absorbance of this same solution in a 2.0 cm cell is
选项：
A: 0.15
B: 0.30
C: 0.60
D: unknown
答案: 【 0.60 】
4、单选题：
The Lambert-Beer’s law states that the absorbance is proportional to the concentation of the analyte mesured. Which one of the following conditions must be fulfilled when making a calibration plot for a given analyte species?
选项：
A: The wavelength must be fixed.
B: The length of light path through the same cell(cuvet) must be fixed.
C: Both of the conditions stated in A and B must be fulfilled simultaneously.
D: the condition stated in B must be fulfilled, but not A.
答案: 【 The wavelength must be fixed.】
Acid-base Equilibrium and Acid-base Titration
Unit test
1、单选题：
The pH of 0.10 mol·L－1 NH4Cl solution is about（Kb=1.8×10-5）
选项：
A: 5
B: 6
C: 7
D: 9
答案: 【 5】
2、单选题：
Which choice listed below have no influence on the buffer capacity?
选项：
A: The concentration of the weak acid.
B: The sum of the concentration of the buffer solution.
C: The ratio of the conjugate base to acid.
D: The pKa of the weak acid.
答案: 【 The pKa of the weak acid.】
3、单选题：
The buffer range of a buffer solution in which there are the same concentrations of Na2HPO4 and Na3PO4 is about ( ). (pKa1=2.12; pKa2=7.21 pKa3=12.32)
选项：
A: 1.12～3.12
B: 6.21～8.21
C: 11.32～13.32
D: all the choice above are wrong.
答案: 【 11.32～13.32 】
4、单选题：
What is the theoretical range of color change of a weak basic indicator whose Kb is 1.0×10－4 ?
选项：
A: pH 4.00～6.00
B: pH 5.00～7.00
C: pH 6.00～8.00
D: pH 7.00～9.00
答案: 【 pH 4.00～6.00】
5、单选题：
Use 0.1000mol·L－1 HCl to titrate a Na2CO3 solution. the volume consumption of 0.1000mol·L－1 HCl is V1 when indicator is phenolphthalein and the volume consumption of 0.1000mol·L－1 HCl is V2 when indicator is methyl orange. What is the relationship between V1 and V2?
选项：
A: V1＜V2
B: V1＞V2
C: V1＝V2
D: all the choice are possible
答案: 【 V1＝V2】
6、判断题：
Greater the Ka，greater the range of titration jump.
选项：
A: 正确
B: 错误
答案: 【 正确】
7、判断题：
The pH of the NH3－NH4Cl buffer solution is more than 7, so it can not resist change in pH down the addition of small amount of strong acid.
选项：
A: 正确
B: 错误
答案: 【 错误】
8、判断题：
H2O, it is a amphoteric substance in Bronsted theory
选项：
A: 正确
B: 错误
答案: 【 正确】
9、判断题：
The proton balance equation of NH4H2PO4 aqueous solution is c(H+)+ c(H3PO4)=c(NH3)+2c(PO43－)+c(HPO42－) +c(OH－).
选项：
A: 正确
B: 错误
答案: 【 正确】
10、判断题：
选项：
A: 正确
B: 错误
答案: 【 正确】
Coordination Compound and Coordination Titration
Unit test
1、单选题：
What is the ligand number of Co3＋ in [Co(en)(C2O4)2]－
选项：
A: 3
B: 4
C: 5
D: 6
答案: 【 3】
2、单选题：
To determine the content of Mg2+ and Ca2+ ions in tap water, in order to keep the pH =10, which buffer system listed below is the best?
选项：
A: 0.1mol·L-1 HAc — 0.1mol·L-1 NaAc (Ka = 1.8×10-5)
B: 0.1mol·L-1 NH3·H2O — 0.1mol·L-1 NH4Cl (Kb = 1.8×10-5)
C: 0.1mol·L-1 NaH2PO4 — 0.02mol·L-1 Na2HPO4 (Ka = 6.23×10-8)
D: 0.1mol·L-1 H2CO3— 0.02mol·L-1 NaHCO3 (Ka = 4.3×10-7)
答案: 【 0.1mol·L-1 NH3·H2O — 0.1mol·L-1 NH4Cl (Kb = 1.8×10-5)】
3、单选题：
In [Co(en)(C2O4)2]-, the coordination number of Co3+ is
选项：
A: 2
B: 3
C: 4
D: 6
答案: 【 6】
4、单选题：
[Ag(NH3)2] + is a linear ion, so the type of hybridization of its central atom Ag+ is
选项：
A: sp
B: sp2
C: sp3
D: dsp2
答案: 【 sp】
5、判断题：
The three general methods for performing EDTA titrations are direct titration, back titration and displacement method.
选项：
A: 正确
B: 错误
答案: 【 正确】
6、判断题：
In a coordination compound, its coordination number must be greater or equal to ligand number.
选项：
A: 正确
B: 错误
答案: 【 正确】
Introduction to Analytical Chemistry
Unit test
1、单选题：
When mass of the solid sample is 0.1~10 mg, it is called
选项：
A: Meso analysis
B: micro analysis
C: semimicro analysis
D: trace analysis
答案: 【 micro analysis】
2、单选题：
Which of the following is not 4 for the number of significant figures ( )?
选项：
A: 0.8056
B: pH=4.000
C: 2.800 ×109
D: 17.36%
答案: 【 pH=4.000】
3、单选题：
In quantitative analysis, which method listed below can not be use to decrease the system e