So I have recently done a lab with cobalt(II) nitrate and NaOCl (bleach) and our objective was to determine if colbalt or the bleach is part of the rate determining step. With the lab we have done trials by diluting the colbalt and leaving the concentration of bleach the same. We also did the other way around. We also have a control step where both solution are not diluted. The results show that with a diluted catalyst the rate of reaction decreased significantly. While diluting the bleach won't show much of a difference, but still decrease in the rate. With that being said, which solution is part of the rate determining step?