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Chemistry

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A 0.39 M solution of a weak acid is 3.0% dissociated. Calculate Ka.

  • Chemistry - ,

    A weak acid, HA. 0.03 x 0.39 = 0.0117
    ................HA ==> H^+ + A^-
    initial........0.39.....0....0
    change.......0.0117...0.0117..0.0117
    equil......0.39-0.0117.0.117..0.0117

    Substitute from the ICE chart into Ka expression and solve for Ka.
    Watch the significant figures.

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