In a 250 ml Erlenmeyer flask, use a volumetric pipette to put 10 ml of the oxalic acid solution
H2C2O4 of unknown normality with 50 ml of distilled water heated to a maximum of 70°C
and 50 ml of sulfuric acid.
Using a funnel, fill the burette with potassium permanganate of normality 0.1N. Pour the
KMnO4 from the burette slowly, while shaking the Erlenmeyer flask constantly. At first the
solution remains red after the first drop, so you have to wait for discoloration before
continuing to pour the KMnO4. Stop pouring the potassium permanganate when a pink color
appears which persists after stirring. .
Note the volume poured and repeat the operation a second time.