- Arts & Culture 5934
- Business & Economics 689
- Computers 310
- Dictionaries & Encyclopedias 81
- Education & Science 75718
- Abstracts 252
- Astrology 4
- Astronomy 1
- Biology 8
- Chemistry 2221
- Coursework 15444
- Culture 9
- Diplomas 411
- Drawings 574
- Ecology 5
- Economy 83
- English 75
- Ethics, Aesthetics 3
- For Education Students 17597
- Foreign Languages 11
- Geography 2
- Geology 1
- History 89
- Maps & Atlases 5
- Mathematics 13850
- Musical Literature 2
- Pedagogics 19
- Philosophy 23
- Physics 14821
- Political Science 5
- Practical Work 101
- Psychology 60
- Religion 4
- Russian and culture of speech 8
- School Textbooks 7
- Sexology 42
- Sociology 9
- Summaries, Cribs 87
- Test Answers 150
- Tests 9243
- Textbooks for Colleges and Universities 32
- Theses 24
- To Help Graduate Students 14
- To Help the Entrant 37
- Vetting 362
- Works 13
- Информатика 10
- Engineering 3059
- Fiction 696
- House, Family & Entertainment 107
- Law 132
- Website Promotion 71
From sample Opt57-2 steel weighing 0.2000 g after sootvets
Refunds: 0
Uploaded: 29.10.2014
Content: 41029153259903.rar 160,83 kB
Product description
57. Option 2
From the sample became 0.2000 g mass after appropriate treatment prepared 100,00 ml solution containing MnO4 (-) and Cr2O7 (2-), and measured its absorbance at filter with λeff = 533 nm and λeff = 432 nm (A533, A432). At six volumetric flasks 100.00 ml placed: 5.00; 8.00; 10.00 ml of the standard permanganate solution (T (Mn) = 0,0001090) or dichromate (T (Cr) = 0,001210), diluted with water to the mark and photometrically under the same conditions.
To determine the mass fraction (%) Mn and Cr in the steel to the following options:
Option 2
Standard solution
___________KMnO4________________K2Cr2O7
V, 5.00 ml of 8.00 10,000 5.00 8.00 10.00 ____
A533 0.230 0.365 0.460 ____ - - -
A432 0.095 0.150 0.190 0.430 0.640 0.780 ____
Test solution:
A533 = 0.330
A432 = 0.760
Additional information
Problems on Optics
Many of the tasks of the "Collection of questions and tasks Analytical Chemistry", ed. Vasiliev VP
All tasks have been successfully surrendered !!!
For any questions (explain answer additional questions of the teacher, etc.) can be treated as Seller is the direct executors of tasks.
Tasks performed in Microsoft Word, graphics - in Microsoft Exel or OriginPro; WinRAR files are archived
Feedback
0Period | |||
1 month | 3 months | 12 months | |
0 | 0 | 0 | |
0 | 0 | 0 |