Inorganic chemistry

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Given the following standard reduction potentials,

Fe^2+(aq) = 2e^- ==> Fe(s) E naught = -0.440V

FeS(s) + 2e^- ==> Fe(s) + S^2-(aq) E naught = -1.010V

determine the Ksp for FeS(s) at 25 degress Celsius

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