Three cstrs are to be used in series in the design of a treatment process. the second reactor has a volume twice that of the first and third reactors. the influent flow has a concentration of 200 mg/l of substance a to be treated, and the flow rate is 400 /min. the reaction is first order, and the rate equation is: the reaction rate constant is 0.40 hr'. determine the following using both the algebraic equation and the graphic solution: a. the mean residence time and volume for each reactor if the conversion of substance a is 90%. b. the concentration of substance a in each reactor and its effluent. c. the total mean residence time and total volume of the three reactors. d. the mean residence time and volume of a single cstr having the same conversion of a to replace the three cstrs.

Achemist at a pharmaceutical company is measuring equilibrium constants for reactions in which drug candidate molecules bind to a protein involved in cancer. the drug molecules bind the protein in a 1: 1 ratio to form a drug-protein complex. the protein concentration in aqueous solution at 25 ˚c is 1.74 x10-6 m . drug a is introduced into the protein solution at an initial concentration of 2.00 x10-6m. drug b is introduced into a separate, identical protein solution at an initial concentration of 2.00 x10-6m. at equilibrium, the drug a-protein solution has an a-protein complex concentration of 1.00 x10-6m, and the drug b solution has a b-protein complex concentration of 1.40 x10-6m. a. calculate the kc value for the a-protein binding reaction. b. calculate the kc value for the b-protein binding reaction. c. assuming that the drug that binds more strongly will be more effective, which drug is the better choice for further research?