Calculate the Ksp of Fe(OH)3  , if the [Fe3+]  is 4.7 x 10^-6 M.

Expert Answers

An illustration of the letter 'A' in a speech bubbles

`Fe(OH)_3_(s) rarr Fe^(3+)+3OH^-`


`Fe^(3+):OH^(-) = 1:3`


`[OH^-] = 3[Fe^(3+)`

           `= 3xx4.7xx10^(-6) M`


`K_(sp) = [Fe^(3+)][OH^-]^3`

`K_(sp) = (4.7xx10^(-6))(3xx4.7xx10^(-6))^3`

`K_(sp) = 1.3175xx10^-(20)M^4`



Approved by eNotes Editorial Team

Posted on

Soaring plane image

We’ll help your grades soar

Start your 48-hour free trial and unlock all the summaries, Q&A, and analyses you need to get better grades now.

  • 30,000+ book summaries
  • 20% study tools discount
  • Ad-free content
  • PDF downloads
  • 300,000+ answers
  • 5-star customer support
Start your 48-Hour Free Trial