- Arts & Culture 6213
- Business & Economics 674
- Computers 316
- Dictionaries & Encyclopedias 74
- Education & Science 76877
- Abstracts 73
- Astrology 4
- Biology 8
- Chemistry 4046
- Coursework 15549
- Culture 8
- Diplomas 316
- Drawings 1595
- Ecology 5
- Economy 76
- English 80
- Ethics, Aesthetics 3
- For Education Students 17573
- Foreign Languages 11
- Geography 3
- Geology 1
- History 88
- Maps & Atlases 5
- Mathematics 12624
- Musical Literature 2
- Pedagogics 19
- Philosophy 22
- Physics 15120
- Political Science 5
- Practical Work 59
- Psychology 63
- Religion 4
- Russian and culture of speech 8
- School Textbooks 7
- Sociology 9
- Summaries, Cribs 87
- Test Answers 160
- Tests 8747
- Textbooks for Colleges and Universities 32
- Theses 7
- To Help Graduate Students 14
- To Help the Entrant 38
- Vetting 385
- Works 13
- Информатика 8
- Engineering 893
- Fiction 706
- House, Family & Entertainment 84
- Law 129
- Website Promotion 68
Solving a chemistry problem
Content: 3.zip 40,58 kB
Product description
3. For the polarographic determination of Mn (II), a calibration graph was constructed: aliquot parts of Val. a solution of Mn(II) salt with a concentration of 1•10-4 mol/l was diluted with a buffer solution to 25 ml and polarograms were obtained. The following data was obtained:
Val. (Mn II), ml 1.0 2.0 3.0 4.0 5.0 6.0
h, mm 9 16
26.5 35 41 54
A sample of the alloy weighing 0.5000 g containing manganese was dissolved in 100 ml of HNO3, 5.0 ml of the resulting solution was taken and diluted with the same buffer solution to 25 ml. During polarography, a wave height of 32.7 mm was obtained. Calculate the mass fraction of Mn in the alloy.
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 | |