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The equilibrium concentration of hydroxide ion in a saturated iron(iii) hydroxide solution is
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The equilibrium concentration of hydroxide ion in a saturated iron(iii) hydroxide solution is

User Haraldkl
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when:

Fe(OH)3 ↔ Fe3+ + 3OH-

so, each 1 mol Fe3+ → 3 mol OH-

and when [OH] = 1.2 x 10^-5

∴ [Fe3+] = (1.2 x 10^-5) / 3

= 4 x 10^-6

when Keq = [Fe3+][OH]^3

= (4 x 10^-6) (1.2 x 10^-5)^3

∴Keq = 6.9 x 10^-21
The equilibrium concentration of hydroxide ion in a saturated iron(iii) hydroxide-example-1
User Idigyourpast
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