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    What is the pK?

    What does it mean when the pK decreases (in terms of reactants and products)?

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    Wikipedia explains this fairly well: http://en.wikipedia.org/wiki/Dissociation_constant
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    pK is the acid dissociation constant.

    http://www.answers.com/acid%20constant
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    (Original post by Revenged)
    What is the pK?

    What does it mean when the pK decreases (in terms of reactants and products)?

    Thanks
    As pK decreases, Kd increases and you get more of the dissociated form
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    (Original post by Gnarl)
    pK is the acid dissociation constant.

    http://www.answers.com/acid%20constant
    Strictly, Ka is the acid dissociation constant

    pKa is the pK of an acid

    pK can be related to any dissociation - doesn't have to be an acid (it is often used in biology for enzyme/substrate binding for example)
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    (Original post by oxymoron)
    Strictly, Ka is the acid dissociation constant

    pKa is the pK of an acid

    pK can be related to any dissociation - doesn't have to be an acid (it is often used in biology for enzyme/substrate binding for example)
    Ah I see, I assumed pKa as the thread's posted in the chemistry forum.
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    (Original post by Gnarl)
    Ah I see, I assumed pKa as the thread's posted in the chemistry forum.
    Yes, well it is a chemistry concept - just used in biology sometimes.

    pKa is a specific form of the pK (as is pKw - dissociation of water)
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    (Original post by oxymoron)
    Yes, well it is a chemistry concept - just used in biology sometimes.

    pKa is a specific form of the pK (as is pKw - dissociation of water)
    "The conjugation of cholic acid with glycine lowers its pK"

    So if the pKa is lowered, this increases the Ka and more H+ ions are released from cholic acid?
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    (Original post by Revenged)
    "The conjugation of cholic acid with glycine lowers its pK"

    So if the pKa is lowered, this increases the Ka and more H+ ions are released from cholic acid?
    Yes, exactly.
 
 
 
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