23. The molar coefficient of light absorption of the co

Description
  • Uploaded: 26.04.2018 8:03:25
  • Content: file 25884 bytes
  • filename: 23.rar

23. The molar coefficient of light absorption of the complex [MoO (SCN) 5] 2- in isoamyl alcohol at λeff = 475 nm is equal to 1.50 * 10 ^ 4. Calculate the minimum mass fraction (%) of molybdenum in the soil, which can be determined by this method, if from the sample of soil weighing 20.00 g, molybdenum is recovered in 200.0 ml of oxalate buffer solution. 150.0 ml of filtrate are taken and, after appropriate treatment, the resulting [MoO (SCN) 5] 2 - 15.00 ml of isoamyl alcohol is extracted. The extract is photometered in a cuvette with l = 3.0 cm. The minimum optical density is 0.020.

Additional information

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.
Questions and problems from the manual:

Tasks are executed in Microsoft Word, graphics - in Microsoft Exel or OriginPro; formulas are typed in the MathType editor (if the formulas contain unreadable characters, then you need to install this editor); files are archived by WinRAR.

Feedbacks of ученьеСвет

(0)