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

Fundamentals Of Analytical Chemistry
9th Edition
ISBN:9781285640686
Author:Skoog
Publisher:Skoog
Chapter31: Introduction To Analytical Separations
Section: Chapter Questions
Problem 31.4QAP
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Chlorine is commonly used to disinfect drinking water,and inactivation of pathogens by chlorine follows first-orderkinetics. The data in figure show E. coliinactivation (a) Determine the first-order inactivation constant, k. (b) How much contact time is required for 95% 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
Transcribed Image Text: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
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