The pH of a saturated solution of ironII hydroxide is 105 Ca

The pH of a saturated solution of iron(II) hydroxide is 10.5. Calculate the value of K_sp for iron(II) hydroxide.

Please explain in detail. thanks

Solution

Fe(OH)2 --->   Fe2+    +     2OH-

                          x                2x

pH = 14+log10[OH-]

pOH = 14