- Arts & Culture 6212
- 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
126. Solving a chemistry problem
Content: 68а.rar 41,23 kB
Product description
68a. An aliquot of the analyzed solution containing the copper cation Cu2, 50.00 ml in volume, was titrated with a standard solution of complexone III (EDTA) in the presence of acetate buffer. The end of the titration was determined using the method of spectrophotometric titration at a wavelength of 745 nm, at which only the reaction product—copper(II) complexonate—absorbs light.
Using the data below, construct a titration curve1 in the coordinates optical density A - volume V (EDTA) of the added titrant and calculate the molar concentration and titer (g/ml) of the copper cation Cu2 in the analyzed solution (do not take into account the dilution of the solution during the titration process).
Option A
c(EDTA), mol/l
Optical density of solution A
after addition of EDTA
1.00 ml 1.50 ml 2.00 ml 2.50 ml 3.00 ml 3.50 ml 4.00 ml
0.1000 0.122 0.183 0.245 0.305 0.335 0.338 0.338
To construct a titration curve when applying scale scales to the coordinate axes, it is recommended to choose for each scale such a scale at which one small cell on millimeter paper would correspond to V(EDTA) = 0.05 ml along the abscissa axis, and A = 0.005 along the ordinate axis.
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 | |