This reaction can occur by a radical process which is turned on when I- concentration is low, or by a non-radical process when the I- concentration is high. Both processes reduce iodate to hypoiodous ...

When the radical process is occurring, HOI is created faster than it can be consumed ... This solution is 4.0M H2O2. Solution B: Place 43 g of potassium iodate and approximately 800 mL distilled water ...