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13 February, 04:14

The ksp of iron (ii) hydroxide, fe (oh) 2, is 4.87 * 10-17. calculate the molar solubility of this compound.

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  1. 13 February, 04:24
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    When iron hydroxide dissolves, it dissociates as follows

    Fe (OH) ₂ - - > Fe²⁺ + 2OH⁻

    molar solubility is the number of moles of solute that can be dissolved is a 1 L solution

    if molar solubility of Fe (OH) ₂ is x then molar solubility of Fe²⁺ is x and OH⁻ is 2x

    the solubility product constant - ksp formula is;

    ksp = [Fe²⁺][OH⁻]²

    ksp = (x) (2x) ²

    ksp = x * 4x²

    ksp = 4x³

    ksp = 4.87 x 10⁻¹⁷

    4x³ = 4.87 x 10⁻¹⁷

    x = 2.30 x 10⁻⁶ M

    molar solubility of Fe (OH) ₂ is 2.30 x 10⁻⁶ M
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