What is the pH of a solution that is 2.5 x 10-9 M in NaOH?Does your answer make sense? What assumption do wenormally make that is not valid in this case?

Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter14: Acid-base Equilibria
Section: Chapter Questions
Problem 76E: The pH of a 0.10-M solution of caffeine is 11.16. Determine Kb for caffeine from these data:...
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What is the pH of a solution that is 2.5 x 10-9 M in NaOH?
Does your answer make sense? What assumption do we
normally make that is not valid in this case?

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