- Arts & Culture 5955
- 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
5. Solving a chemistry problem
Uploaded: 16.08.2023
Content: 9.zip 18,82 kB
Product description
9. To determine the amount of chloracone released from the drug tablet into the hydrochloric acid medium (“dissolution” test), the drug tablet containing m grams of chloracone is placed in a “rotating basket” device immersed in 0.1 mol / l HCl with a volume of 500 ml. 45 min after the start of the test, the solution is filtered and its optical density A(X) is determined at 257 nm. In parallel, under the same conditions (at 257 nm in a cuvette with the same thickness of the absorbing layer), the optical density A(st) of a standard solution of chloracone with a concentration c(st), g/ml is measured.
Derive the following formula to calculate the amount of chloracone W in percent that has gone into solution; W,% \u003d A (X) * s (X) * 500 * 100 / A (X) * m
where m is the mass of chloracone (in grams) contained in one tablet.
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 | |