Write the oxidation half-reaction, reduction half-reaction, and the net redox reaction between KMNO4 and FeCl,. Explain why the oxidation capability of permanganate increases in acidic medium. What happens when basic medium is used instead? A 0.1298-g sample of KBrO3 was dissolved in dilute HCl and treated with an unmeasured excess of KI. The liberated iodine required 41.32 mL of a sodium thiosulfate solution. Calculate the molar concentration of the Na,S2O3 Write the complete redox equation between oxalic acid and permanganate in basic medium.