- Arts & Culture 5972
- Business & Economics 690
- Computers 317
- Dictionaries & Encyclopedias 82
- Education & Science 76645
- Abstracts 226
- Astrology 4
- Astronomy 1
- Biology 8
- Chemistry 2723
- Coursework 15846
- Culture 8
- Diplomas 411
- Drawings 576
- Ecology 6
- Economy 82
- English 78
- Ethics, Aesthetics 3
- For Education Students 17639
- 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 8965
- 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 3062
- Fiction 695
- House, Family & Entertainment 106
- Law 133
- Website Promotion 71
145. Solving a chemistry problem
Uploaded: 11.08.2023
Content: 54--2.rar 59,42 kB
Product description
54. Option 2
50.00 ml of standard solutions of cobalt (0.30 μg / ml) and nickel (0.10 μg / ml) were placed in two separatory funnels, N, N’-diethyldithiocarbamate was added and the resulting CCl4 complexes were extracted. Extracts were collected and diluted to 10.00 ml CCl4. The optical density of both extracts was measured at 367 and 328 nm in cuvettes of l = 1.0 cm and obtained: A367, Co = 0.365, A328, Co = 0.100, A367, Ni = 0.186, A328, Ni = 0.300.
An aliquot of the analyzed solution with a volume of 50.00 ml containing cobalt and nickel was placed in a separatory funnel and all the reagents were added, as for standard solutions. The optical density of the obtained extract (10.00 ml of CCl4) was measured at 367 and 328 nm. l = 1.0 cm
Calculate the concentration (µg / ml) of cobalt and nickel in the analyzed solution from the results of measurements:
2) A367 = 0.410; A328 = 0,320
Feedback
0Period | |||
1 month | 3 months | 12 months | |
0 | 0 | 0 | |
0 | 0 | 0 |