- Arts & Culture 5978
- Business & Economics 690
- Computers 313
- Dictionaries & Encyclopedias 82
- Education & Science 75654
- Abstracts 225
- Astrology 4
- Astronomy 1
- Biology 8
- Chemistry 2792
- Coursework 15846
- Culture 8
- Diplomas 411
- Drawings 673
- Ecology 6
- Economy 82
- English 78
- Ethics, Aesthetics 3
- For Education Students 17264
- Foreign Languages 11
- Geography 3
- Geology 1
- History 89
- Maps & Atlases 5
- Mathematics 13871
- Musical Literature 2
- Pedagogics 19
- Philosophy 23
- Physics 15074
- 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 154
- Tests 8184
- Textbooks for Colleges and Universities 32
- Theses 24
- To Help Graduate Students 14
- To Help the Entrant 37
- Vetting 364
- Works 13
- Информатика 10
- Engineering 3059
- Fiction 694
- House, Family & Entertainment 105
- Law 133
- Website Promotion 71
3. The content of samarium in cerium dioxide was determ
Refunds: 0
Uploaded: 06.03.2021
Content: САМАРИЙ.rar 20,63 kB
Product description
3. The content of samarium in cerium dioxide was determined by the addition method. A standard solution of samarium nitrate was prepared by dissolving 115.8 mg of Sm2O3 in nitric acid. The dry residue after evaporation was dissolved in water and diluted to 100.0 ml (solution A). Then 0.10 ml of solution A was diluted with water to 100.0 ml (solution B).
A sample of СеО2 weighing t mg was mixed with sodium sulfate and divided into two equal parts. One of them was injected with 0.5 ml of solution B; the mixture was dried and calcined. The luminescence intensity of the obtained phosphors (peak height, mm) turned out to be:
Option 1 2 3
m, mg 200 170 190
h, mm 50 40 30
hx + 3, mm. 70 60 55
Calculate the mass fraction (%) of samarium in cerium dioxide.
Additional information
If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.
Feedback
0| Period | |||
| 1 month | 3 months | 12 months | |
| 0 | 0 | 0 | |
| 0 | 0 | 0 | |