- Arts & Culture 5954
- Business & Economics 689
- Computers 317
- Dictionaries & Encyclopedias 81
- Education & Science 74949
- Abstracts 252
- Astrology 4
- Astronomy 1
- Biology 8
- Chemistry 2513
- Coursework 15782
- Culture 9
- Diplomas 411
- Drawings 571
- Ecology 6
- Economy 82
- English 78
- Ethics, Aesthetics 3
- For Education Students 17627
- Foreign Languages 11
- Geography 3
- Geology 1
- History 89
- Maps & Atlases 5
- Mathematics 12325
- Musical Literature 2
- Pedagogics 19
- Philosophy 23
- Physics 14911
- 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 151
- Tests 9245
- 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 3060
- Fiction 696
- House, Family & Entertainment 107
- Law 133
- Website Promotion 71
37. To determine the total content of heavy metals in w
Refunds: 0
Uploaded: 31.07.2019
Content: 37.rar 8,88 kB
Product description
37. To determine the total content of heavy metals in water (lead, copper, cadmium, etc.), they are extracted from water as dithizonate complexes into carbon tetrachloride, then, after removing excess dithizone, it is treated with Hg (II) salt for conversion to dithizonate mercury photometry. The optical density of mercury dithizonate obtained by treating 500.00 ml of water is equal to 0.110 at λ = 485 nm. 500.00 ml of a standard solution containing 2.00 ml of Hg (NO3) 2 * 4H2O with T = 0.00001542 g / cm3 passed through all stages of the analysis, similarly to the test solution. The optical density of it was equal to 0,280.
What is the total content of heavy metals in water (mmol / dm3)?
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
0Period | |||
1 month | 3 months | 12 months | |
0 | 0 | 0 | |
0 | 0 | 0 |