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23 June, 06:42

At pH = 8, which species is most likely to predominate in solution? pKa (-NH3+) = 9.9, pKa (-COOH) = 2.3

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  1. 23 June, 06:51
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    The NH3 + with a PKa = 9.9

    Explanation:

    The Pka is a mathematical expression to express the dissociation grade of a substance in a solution, that means with a substance with a pKa small is a strong acid, and in this case since the solution pH is 8, that mean that the substance with high pKa (lower acid strength) will predominate in a pH of 8.
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