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The base protonation constant Kb of allantoin (C4H4N3O3NH2) is 9.12106. Calculate the pH of a 0.85M solution of allantoin at 25C. Round your answer to

The base protonation constant Kb of allantoin (C4H4N3O3NH2) is 9.12106. Calculate the pH of a 0.85M solution of allantoin at 25C. Round your answer to 1 decimal place.

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