Necessary solutions:
1- 7 normal sulfuric acid
2- Potassium iodide 0.6 M
3- Standardized 0.1 M sodium thiosulfate
Method of work:
1- Pipet 5 ml of 7 normal sulfuric acid into it.
3- Pipette 20 ml of 0.05 M potassium iodate into a flask with a lid.
2- Pipet 8 ml of 0.6 M potassium iodide into the Erlenmeyer flask.
4- Titrate the iodine released from the reaction with standardized 0.1 M sodium thiosulfate.
5- Near the end point, add 3 milliliters of starch binder to continue the discoloration of the titer solution.
Do the above test more than 2 times and average the results.
