Examine the difference in the rate of oxidation of TCE and chloroacetic acid (CAA) in double-distilled water versus the rate in a typical natural water. Here, kNOM is 3 x 10 L/mol C-s, TCE is 4.2 x 10 L/mol s, and kCAA is 4.3 x 107 L/mol s. The NOM concentrations in distilled water and natural water are 0.05 and 1.4 mg/L, respectively. The initial concentrations of TCE and CAA are 100 and 60 g/L. Estimate QR for each compound in distilled water and in the natural water.