5. To titrate a technical sample weighing 0.75 g of KMnO4, 18.5 cm3 of Na2C2O4 solution C1/z=0.25 mol/dm3 was required. Determine the mass fraction of KMnO4 in the sample.

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 :)