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22 July, 17:07

Calculate the concentration of h3o in a solution that contains 5.5 * 10-5 m oh - at 25°c. identify the solution as acidic, basic, or neutral.

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  1. 22 July, 17:30
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    We have been given the OH⁻ ion concentration, we can calculate the pOH concentration.

    pOH = - log [OH⁻]

    pOH = - log (5.5 x 10⁻⁵ M)

    pOH = 4.26

    we can then calculate the pH value

    pH + pOH = 14

    pH = 14 - 4.26

    pH = 9.74

    since pH > 7 the solution is basic.

    by knowing the pH value, we can calculate the H₃O⁺ concentration

    pH = - log[H₃O⁺]

    [H₃O⁺] = antilog (-pH) = antilog (-9.74)

    [H₃O⁺] = 1.82 x 10⁻¹⁰ M
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