WARNING! This experiment is dangerous! You should NOT perform this at home. ONLY carry out this experiment, if you are a trained chemist, and you understand local safety and legal requirements, which are required to perform such experiments
- Dissolve a small amount of potassium chlorate in water, using a flat-bottomed flask.
- Add several drops of concentrated nitric acid so that the pH of the solution becomes about two.
- Add a small amount of iodine.
- Heat the flask until all iodine dissolves, using a spirit lamp.
- Add a small amount of potassium hydroxide until the medium becomes basic.
- Filter the resulting mixture.
- Evaporate half of the water from the filtrate.
- Place the cup with the solution in a refrigerator.
- The white precipitate should fall. Decant the yellow solution above the precipitate.
- The resulting precipitate is potassium iodate.