Solubility of Ferro oxide (Fe2O3) in water Vs the pH

[Jeffrop]

Hi every body

It's will very appreciate if somme one can tell me the solubility of Ferro oxide (Fe2O3) in water acid to basic (pH from 1 to 14)

Many thanks

 

[kenvlach]

Do you really want the solubility of Fe₂O₃? This dissolves very slowly except in strong acids, and dissociates upon dissolution.

There are links for the solubility of metals (including Fe⁺³) as a function of pH in thread161-50054

The solubility of Fe⁺³ can also be calculated as a function of pH from the solubility product, K_sp, of Fe(OH)₃.

K_{sp, Fe(OH)3} = [Fe⁺³][OH^-]³ = 6 x 10^-38,

so [Fe⁺³] = K_sp/[OH^-]³, moles/Liter

and of course [OH^-] = 10^{-[14 – pH]}

 

[Jeffrop]

Thanks kenvlach ! Jeffrop