The herbicide, cotoran, was extracted from 100.00 ml of wastewater with chloroform. The extract was evaporated, transferred to a cuvette and titrated at 290 nm with an acetic acid solution of HClO4 T(HClO4/cotoran) = 0.0003000 g/ml. Calculate the concentration of mg/l cotoran in water based on the following results:
Option 3
Optical density of the solution after adding HClO4
0.0 ml 0.4 ml 0.8 1.2 1.6 2.0 2.4 2.8
0.375 0.335 0.300 0.265 0.225 0.190 0.155 0.125 0.100 0.085 0.070

If you cannot open the file or have any problems, do not rush to leave a negative review! Contact me and I will quickly help you solve the problem. After purchasing, please leave a positive review of the product :)