35. Solving a chemistry problem

35. Solving a chemistry problem

123. A sample of the analyzed sample with mass m was dissolved and, after appropriate treatment, titrated with Me2+ titrant R, photometrically. Construct a titration curve and calculate the mass fraction (%) of X in the sample based on the following measurement results (Table 22)
PROBLEM 123
Ме2+ Fe2+
RKMnO4
m, g 0.998
Concentration R T KMnO4/Fe=0.005544
Optical density of the solution after adding the appropriate volume of titrant R, ml 10.0 12.0 14.0 16.0 18.0
0.02 0.02 0.07 0.14 0.20

Additional information:

If the file does not open for you, install the Rar archiver program. Inside the archive, the solution is in WORD format.