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A series of experiments was conducted in a batch reactor to test the disinfection by chlorine of the protozoan Giardia lamblia. In each experimental run, the concentration of free available chlorine was varied and the time required to kill 99% of the organisms was determined. The results showed that a Ctc value of 100minmg/L was sufficient to achieve 2-log removal. (a) In Chick's law, what value of k corresponds to a chlorine concentration of 1mg/L ? (b) At a chlorine dose of 1mg/L and a contact time of 10 minutes, what fraction of the G. lamblia organisms would be killed? (c) At a chlorine dose of 10mg/L and a contact time of 5 minutes, estimate the fraction of the G. lamblia organisms that would be killed