4. Coulometric titration of Cr3 in a sulfuric acid solution with electrically generated MnO4- ions at a current strength of 20.0 mA was completed in 250 s. Calculate the mass of Cr3 in solution.
1) 0.9 mg 2) 0.18 mg 3) 0.27 mg 4) 0.36 mg

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.