For this graph plot the natural log of chlorine concentration as a function of time using the pooled time course data. Does the chlorine reaction kinetics follow a first order process? What is the chlorine reaction rate constant? How does this rate constant compare to a first order decay distribution rate (kdistribution) in the system (kdistribution ~ 1/tresidence time; residence times in a distribution system can vary from about 0 to 7 days)?

35 Measured residual Theoretical 30 25 20 Residual, mg/L 15 10 5 3 0 5 10 25 30 35 15 20 Chlorine Dosage, mg/L