[chrisbb]

Hi people.
Just been going through my lab I did last week, as well as the one I'm going tomorrow. It notes that I need to restandardize the I₂ solution, and probably the S₂O₃^-2. I looked into why, and the prof said that the I₂ will decompose after a little while, despite it being in an amber bottle in the dark.

Does anyone know of any other interferences for the 2 solutions?
Thanks.