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    Ranking acidity and hydrogen atoms

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    Homework: Organic quemistry
    1- What is the pKa of hydrogen HA? About 45 for sp2 carbon.

    2- What is the pKa of hydrogen HB? About 55 for sp3 carbon
    3- What is the pKa of hydrogen HC? About 18 for alcohols
    4- What is the pKa of hydrogen HD? About 15 for amide

    The pKa values given are rough estimates. If you have a number of choices to choose from, then the values may be different. So let me know if they have given choices.

    5- The epoxyserinones represent some of the first compounds discovered from fungi cultured from deep-ocean sediment collections. What is the hybridization of the atom labeled A?

    With one pi bond, it is sp2.

    6- What is the formal charge of the atom labeled B?

    Formal charge = number of valence electrons in neutral atom - valence electrons of atom in the compound = 6 - 7 = -1

    7- What is the ...

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    The solution discusses ranking acidity and hydrogen atoms.