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I cannot for the life of me understand this problem! Please help!
The solubility of Fe(OH)3 in an aqueous solution was determined to be 4.5 x 10-10 M. The equilibrium concentration of each ion can be determined from the molar solubility and the balanced dissociation reaction of Fe(OH)3. What is the value of Ksp for Fe(OH)3?
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Fe(OH)3-->Fe3+ + 3OH-
Ksp=[Fe3+ ][OH-]3
**(I understand all up to this point, but below I don't)
[OH-]=3[Fe3+]; [Fe3+ ]= 4.5 x 10-10M
Ksp=[ Fe3+ ](3[Fe3+])3=27[Fe3+ ]4
Ksp=(4.5 x 10-10)[394.5x10-10)]3 = 27 (4.5 x 10-10)4
Ksp=1.1 x 10-36
The solubility of Fe(OH)3 in an aqueous solution was determined to be 4.5 x 10-10 M. The equilibrium concentration of each ion can be determined from the molar solubility and the balanced dissociation reaction of Fe(OH)3. What is the value of Ksp for Fe(OH)3?
--------------------------------------------------
Fe(OH)3-->Fe3+ + 3OH-
Ksp=[Fe3+ ][OH-]3
**(I understand all up to this point, but below I don't)
[OH-]=3[Fe3+]; [Fe3+ ]= 4.5 x 10-10M
Ksp=[ Fe3+ ](3[Fe3+])3=27[Fe3+ ]4
Ksp=(4.5 x 10-10)[394.5x10-10)]3 = 27 (4.5 x 10-10)4
Ksp=1.1 x 10-36