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The concentration of OH- in a solution is 2 X 10 (-4) M. What is its H3O+ concentration?

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The concentration of OH- in a solution is 2 X 10 (-4) M. What is its H3O+ concentration?

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  1. [H+] x [OH-] = 10^-14

    so [H+]= 10^-14/(2 x 10^-4)= 5 x 10^-9

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