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The Fe2+ concentration in a saturated solution of iron(II) hydroxide is measured and found to be...

The Fe2+ concentration in a saturated solution of iron(II) hydroxide is measured and found to be 1.28×10-5 M. Use this information to calculate a Ksp value for iron(II) hydroxide.

Ksp =

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Answer #1

Fe(OH)2 ----------------> Fe+2 + 2OH-

                                       s          2s

   Ksp = [Fe+2][OH-]2

             = s*(2s)^2

              = 4s^3

Ksp     = 4*(1.28*10^-5)^3

            = 8.06*10^-15

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