- Arts & Culture 6815
- Books in Foreign Languages 152
- Business & Economics 4410
- Computers 2161
- Dictionaries & Encyclopedias 608
- Education & Science 105492
- Abstracts 1333
- Astrology 12
- Astronomy 14
- Biology 34
- Chemistry 5903
- Coursework 6335
- Culture 27
- Diplomas 2360
- Drawings 1265
- Ecology 29
- Economy 336
- English 996
- Entomology 2
- Ethics, Aesthetics 22
- For Education Students 31976
- Foreign Languages 57
- Geography 19
- Geology 17
- History 266
- Maps & Atlases 37
- Mathematics 14523
- Musical Literature 7
- Pedagogics 202
- Philosophy 176
- Physics 16156
- Political Science 122
- Practical Work 178
- Psychology 465
- Religion 44
- Russian and culture of speech 56
- School Textbooks 66
- Sexology 67
- Sociology 48
- Summaries, Cribs 717
- Tests 20623
- Textbooks for Colleges and Universities 213
- Theses 206
- To Help Graduate Students 21
- To Help the Entrant 114
- Vetting 382
- Works 50
- Информатика 16
- Engineering 3416
- Esoteric 949
- Fiction 3234
- For Children 390
- House, Family & Entertainment 2484
- Law 2698
- Medicine 1234
- Newspapers & Magazines 366
- Security 264
- Sport, Tourism 992
- Website Promotion 635
39. To construct a calibration graph for the purpose of
Refunds: 0
Uploaded: 31.07.2019
Content: 39.rar 150,6 kB
Product description
39. To construct a calibration graph for the purpose of determining ions in water, a standard solution with mg / ml was used. Samples in the range of 0.10 ... 0.80 ml were treated with the necessary reagents, a 0.1% solution of chromotropic acid was added, the volume was adjusted to 10.00 ml with concentrated sulfuric acid, and the optical density was measured in a three-centimeter cuvette. Received the following data:
Vst. p-ra, ml 0.10 0.20 0.40 0.60 0.80
Optical square A 0.100 0.202 0.318 0.603 0.802
An aliquot of the analyzed solution with a volume of 2.50 ml passed through all stages of the analysis, as well as the standard solution. The optical density of this solution was 0.550.
Calculate the concentration (mg / dm3) of ions in the analyzed solution (water). How many times the concentration of ions is lower than the MPC (MPC = 10.00 mg / 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.