Question:

Find molar concentration of H30

by Guest63797  |  earlier

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What is the molar concentration of H3O in a 5.80x10-3M aqueous solution of a weak diprotic acid H2Y if its Ka1 is equal to 3.8x10-9and Ka2 is equal to 8.9x10-17.

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  1. H2Y --> H+ & HY-

    Ka1 = [H+] [HY-] / [H2Y]

    3.8e-9 = [x] [x] / [5.8e-3]

    x2 = 2.2e-11

    x = {H3O+] = 4.69e-6 Molar

    your answer is : 4.7e-6 Molar

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