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6 February, 17:30

Of the choices below, which is true for the relationship shown? It is Ka for the acid H3P2O72-. It is Kb for the acid H3P2O72-. It is Ka for the acid H2P2O72-. It is Kb for the acid H2P2O72-.

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  1. 6 February, 21:13
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    The expression for the Ka for the given acid is:

    Ka = [H2P2O7^2-] [H3O+] / [H3P2O7^2-]

    Ka is the acid dissociation constant or the acidity constant. It is a measure of the acid strength when in solution. It is an equilibrium constant for the dissociation of the acid.
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