- Arts & Culture 5856
- Business & Economics 679
- Computers 309
- Dictionaries & Encyclopedias 81
- Education & Science 74851
- Abstracts 100
- Astrology 4
- Astronomy 1
- Biology 8
- Chemistry 2047
- Coursework 15184
- Culture 9
- Diplomas 414
- Drawings 817
- Ecology 5
- Economy 84
- English 75
- Ethics, Aesthetics 3
- For Education Students 17545
- Foreign Languages 11
- Geography 2
- Geology 1
- History 89
- Maps & Atlases 4
- Mathematics 13808
- Musical Literature 2
- Pedagogics 19
- Philosophy 23
- Physics 14735
- Political Science 5
- Practical Work 59
- Psychology 60
- Religion 4
- Russian and culture of speech 8
- School Textbooks 7
- Sexology 42
- Sociology 9
- Summaries, Cribs 87
- Test Answers 145
- Tests 8962
- Textbooks for Colleges and Universities 32
- Theses 7
- To Help Graduate Students 13
- To Help the Entrant 37
- Vetting 361
- Works 13
- Информатика 10
- Engineering 3059
- Fiction 696
- House, Family & Entertainment 107
- Law 132
- Website Promotion 71
Opt51-2 standard solution Prepare a solution of cerium
Refunds: 0
Uploaded: 23.10.2014
Content: 41023150050397.rar 23,69 kB
Product description
51. Option 2
The standard solution was prepared by dissolving cerium 0.0500 g in 250.0 ml of perchloric acid and hydrochloric acid. The flasks were placed 25.00 ml: 2.50; 3.00; 3.50; 4.00; 4.50; 5.00 ml of standard solution was added ammonia, hydrogen peroxide, nitrilotriacetic acid, and diluted to the mark with water. With respect to the first photometric solution obtained:
Vst, 3.00 ml; 3.50; 4.00; 4.50; 5.00
Aotn 0.135 0.270 0.405 0.545 0.680
A portion of the lanthanide oxides weighing 0.0500 g was dissolved, add the required reagents, diluted to 25.00 mL and photometrically, as in the construction of the calibration curve.
Calculate the mass fraction of lanthanide oxides in the sample on the following data.
Aotn.h = 0.440
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 |