Reactions A1-A3 dominate (A3 is very fast) until all HSO3- is consumed. I3- is consumed as fast as it is produced, preventing the blue I5--starch complex from forming. When HSO3- is gone, reaction B ...
Reactions A1-A3 dominate (A3 is very fast) until all HSO3- is consumed. I3- is consumed as fast as it is produced, preventing the blue I5--starch complex from forming. When HSO3- is gone, reaction B ...