Does anyone know about solubility of Fe(OH)3 in hot water? Is Fe(OH)3 precipitate faster or lower than in cold? Does someone have graphic or diagram about solubility of Fe(OH)3 vs temperature? I unable to find in my book and internet. Please help me. Thanks for anyone helping
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Solubility Of Fe(Oh)3 Vs Temperature
#1
Posted 13 August 2014 - 09:13 AM
#2
Posted 13 August 2014 - 12:47 PM
Solubility of Fe(OH)3 depends on concentration of Fe3+ and concentration of OH- and is determined by the Solubility Product Ksp of Fe(OH)3
Use google to find Solubility Product at different temperatures.
#3
Posted 13 August 2014 - 10:08 PM
Ok, but is principle of Ksp work for solid? Because my Fe(OH)3 is in solid form, not in ionic form. Thanks for answering me pingpong
#4
Posted 14 August 2014 - 05:05 AM
It applies to all inorganics that are ions in solution, but can form solid precipitate if their Ksp is exceeded.
Ksp = [Fe3+]*[OH-]3
Ksp is an equilibrium constant (depending on temperature), which for Fe(OH)3 is in the order of 10-38 (exact number depends on which source you believe, use google) so you can imagine that the solubility of Fe(OH)3 in water is very low.
You really must familiarise yourself with the theory of Solubility Product.
EDIT: Fe3+ and OH- can also form various soluble complexes, each with their own equilibrium constant, which complicates calculating the exact solubility of Fe(OH)3
See section in: http://chemwiki.ucda...lity_Equilibria
Edited by PingPong, 14 August 2014 - 05:45 AM.
#5
Posted 15 August 2014 - 12:08 AM
Ok, i get it Mr pingpong. Thanks
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