2. An excess of KI solution was added to 40.0 cm3 of KMnO4 solution (1.0 cm3 of KMnO4 solution is equivalent to 0.0050 g of iron) and the released iodine was titrated with 35.9 cm3 of Na2S2O3 solution. Calculate the copper titer of Na2S2O3 solution.

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