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The pH of a 0.10-M solution of caffeine is 11.70. Determine Kb for caffeine from these...

The pH of a 0.10-M solution of caffeine is 11.70. Determine Kb for caffeine from these data:

C8H10N4O2 (aq)+ H2O(l) ⇌ C8H10N4O2H (aq) + OH (aq)

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