Chemistry HL/SL IA (23/24)

High-scoring Chemistry HL IA that scored full marks for nearly all categories, obtaining a final score of 23/24.  The Research Question is as follows:
 
RQ: What is the activation energy (J mol-1) of the Iodine Clock Reaction (S2O8 variant), by measuring the time (s) taken for a mixture of persulfate (S2O3), iodide ions I- and peroxodisulfate (S2O82-) to turn blue-black at different temperatures (K)?