I have just done an experiment on the clock reaction between iodine and persulfate ions. Using my experiment result, I have determined that the reaction orders are about 1.2 with respect to both persulfate and iodine ions. There is this question ' Explain why the reaction orders should be integers' in the exercise section of my lab manual which I am supposed to answer. Can anyone give me a reason why the reaction orders can be rounded off to the nearest integer? Thanks.