J.R. S. answered 10/26/22
Ph.D. University Professor with 10+ years Tutoring Experience
La(IO3)3(s) <==> La3+(aq) + 3IO3-(aq)
Ksp = [La3+][IO3-]
7.5x10-12 = (x)(3x)3
7.5x10-12 = 27x4
x4 = 2.78x10-13
x = 7.26x10-4 M = [Li3+] = solubility of La(IO3)3