Prepare N/20 solution of oxalic acid. Using this solution, find out strength and normality of the given potassium permanganate solution

Prepare N/20 solution of oxalic acid. Using this solution, find out strength and normality of the given potassium permanganate solution

Prepare N/20 solution of oxalic acid. Using this solution, find out strength and normality of the given potassium permanganate solution.

Chemical equations

Indicator
KMnO₄ is a self-indicator.

Endpoint
Colourless to permanent pink colour (KMnO₄ in burette).

Procedure

1. Rinse and fill the burette with the given KMnO₄ solution.
2. Weigh exactly 1.58 g of oxalic acid crystals and dissolve in water to prepare 500 ml of
   its solution using a 500 ml measuring flask. Rinse the pipette with the N/20 oxalic acid
   solution and pipette out 20 ml of it in a washed titration flask.
3. Add one test tube (~ 20 ml) full of dilute sulphuric acid (~ 4 N) to the solution in , titration flask.
4. Note the initial reading of the burette.
5. Heat the flask to 60-70°C and add KMnO₄ solution from the burette till a permanent light pink colour is just imparted to the solution in the titration flask.
6. Note the final reading of the burette.
7. Repeat the above steps 4-5 times to get three cdncordant readings.

Observations

CALCULATIONS