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March 26, 2017

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If the Kb of a weak base is 2.6 × 10-6, what is the pH of a 0.24 M solution of this base?

  • Chemistry - ,

    Call the weak base ANH2
    ........ANH2 + HOH ==> ANH3^+ + OH^-
    I.......0.24.............0........0
    C.........-x.............x........x
    E......0.24-x............x.........x

    Kb = (ANH3^+()(OH^-)/(ANH2)
    Substitute from the ICE chart and solve for x = (OH^-) and convert to pH.

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