Which of the following has a pK_a value of approximately 25? A)CH₃CH₃ B)CH₂=CH₂ C)HC$\equiv$CH D)CH₃CH₂OH

Question

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The pK_a value is a measure of the acidity of a compound, specifically the acidity of the hydrogen atom attached to the heterocyclic nitrogen in a purine or pyrimidine base. In the given options, only option C contains a heterocyclic nitrogen atom with a hydrogen atom attached to it (indicated by the "H" in the formula). This compound has a pK_a value of approximately 25, which matches with the given information. The other options do not contain a heterocyclic nitrogen with a hydrogen atom attached in the same position, and therefore cannot have the same pK_a value.

Which of the Following Has a PKa Value of Approximately ≡\equiv≡

Which of the Following Has a PK_a Value of Approximately $\equiv$