Chemical Properties
Potassium iodate is an oxidizing agent and as such it can cause fires if in contact with combustible materials or reducing agents. It can be prepared by reacting a potassium-containing base such as potassium hydroxide with iodic acid, for example:
- HIO3 + KOH → KIO3 + H2O
It can also be prepared by adding iodine to a hot, concentrated solution of potassium hydroxide.
- 3 I2 + 6 KOH → KIO3 + 5 KI + 3 H2O
Or by fusing potassium iodide with potassium chlorate, bromate or perchlorate, the melt is extracted with water and potassium iodate is isolated from the solution by crystallization:
- KI + KClO3 → KIO3 + KCl
Conditions/substances to avoid include: heat, shock, friction, combustible materials, reducing materials, aluminium, organic compounds, carbon, hydrogen peroxide and sulfides.
Read more about this topic: Potassium Iodate
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