CHEM-C 341 Study Guide - Midterm Guide: Conjugate Acid, Imidazole, Theobromine
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You are allowed to have a simple model set at your seat. It is critically important that your answers be written in a clear, unambiguous manner. Answers in which your intentions are unclear will not receive credit. Regrades late in the semester on earlier work will not be considered just because you did not pick up your assignments in a timely manner. Circle the strongest resonance contributor for each below (most stable resonance structure): (5 points) pyrrole has a pka of 23. Start answering the question by drawing the conjugate base for imidazole and all its resonance structures; structures must be provided to answer the question well enough for full credit. Explain, with structures, why these 2 structurally different acids have same pka. Use carefully drawn structures to support your answer. Write the pka values under each acid, so we can evaluate your progress better and give partial credit.
