Here I make potassium iodide from elemental iodine and potassium hydroxide. 3I2 + 6KOH == 5KI + KIO3 + 3H2O The coproduct of potassium iodate can be separated easily because it is far less soluble in water, and to ensure it was all precipitated out I immersed the solution in an ice bath. This video is a good demonstration of how things really go when you do chemistry yourself. You start with a