38. The data for the determination of the Phenol Coefficient of phenophene are s

Question

38. The data for the determination of the Phenol Coefficient of phenophene are shown in the following table. What is the Phenol Coefficient for phenophene? (show your work). Which agent (Phenophene or Phenol) is the better killing agent? (2pts) CHEMICAL DILUTION EXPOSURE TIMEMIN 10 15 1:10-1:150 1:160 1:170 1:180 1:190-1:500 Phenophene 1:10-1:70 1:80 1:90 1:100 1:100-1:500 Phenol Show work The Phenol Coefficient for Phenophene is The better killing agent is 39. Is boiling a reliable method used to sterilize drinking water? Answer Yes or No and then Explain. (1 pt)

Explanation / Answer

1. phenol coefficient for phenophene = Highest dilution of disinfectant killing microorganisms in 10min / Highest dilution of phenol killing microorganisms in 10min

= 160/80 = 2

The better killing agent is phenophene.

39. Yes. Boiling water will destroyed all the microorganisms in the water. The heat disrupt the bacterial cell wall and also the proteins present in the cell.

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