Which compound is least soluble

Question

Which compound below is the least soluble in water based on its Ksp value?

A.) Fe(OH)₂ ksp = 4.87×10^-17

Answer 1

To figure this out, remember that for Ksp values, the larger the Ksp value, the more soluble a compound is. The smaller the Ksp, the less soluble it is. So look. through the answer choices and whichever has the smallest Ksp is the least soluble.