16.84 Chlorine is commonly used to disinfect drinking water, and inactivation of pathogens by chlorine follows first-order kinetics. The following data show E. coli inactivation: Contact Time (min) Percent (%) Inactivation 0.00 0.0 0.50 68.3 1.00 90.0 1.50 96.8 2.00 99.0 2.50 99.7 3.00 99.9 (a) Determine the first-order inactivation constant, k. [Hint: % inactivation = 100 × (1 – [A]/[A])·] (b) How much contact time is required for 95% inactivation?

16.84 Chlorine is commonly used to disinfect drinking water, and inactivation of pathogens by chlorine follows first-order kinetics. The following data show E. coli inactivation: Contact Time (min) Percent (%) Inactivation 0.00 0.0 0.50 68.3 1.00 90.0 1.50 96.8 2.00 99.0 2.50 99.7 3.00 99.9 (a) Determine the first-order inactivation constant, k. [Hint: % inactivation = 100 × (1 – [A]/[A])·] (b) How much contact time is required for 95% inactivation?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

16.84 Chlorine is commonly used to disinfect drinking water, and
inactivation of pathogens by chlorine follows first-order kinetics.
The following data show E. coli inactivation:
Contact Time (min)
Percent (%) Inactivation
0.00
0.0
0.50
68.3
1.00
90.0
1.50
96.8
2.00
99.0
2.50
99.7
3.00
99.9
(a) Determine the first-order inactivation constant, k. [Hint:
% inactivation = 100 × (1 – [A]/[A])·]
(b) How much contact time is required for 95% inactivation?

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