The solubility product of iron (III) hydroxide is 1.6xx10^(-39). If x – InterviewSolution

1.	The solubility product of iron (III) hydroxide is 1.6xx10^(-39). If x is the solubilityof iron (III) hydroxide, then which of the following expressions can be used to calculate x ?
Answer» `K_(sp)=x^(4)` `K_(sp)=9x^(4)` `K_(sp)=27X^(3)` `K_(sp)=27x^(4)` Solution :`FE(OH)_(3)hArr underset(x)(Fe^(3+))+underset(3X)(3OH^(-))` `K_(sp)=(x)(3x)^(3)=27 x^(4)`.

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