Elemental iodine is a fairly reactive substance. In our case, it forms triiodide ions (I3-) in the solution, giving it a dark brown color (yellow in dilute solution) and acting as an oxidizing agent.

The reaction between iodate and bisulfite in acid medium produces iodine. Solutions A (iodate ... and 10mL of 1M H2SO4 (sulfuric acid). Dilute to 1L. NOTE: Solution B is stable for approximately 10 ...

SINCE the cost of radioactive iodine being used in New Zealand is increased ... which can be filtered off immediately and washed with dilute sulphuric acid before further treatment.