J.R. S. answered 05/08/24
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Common ion effect:
La(IO3)3(s) <==> La3+(aq) + 3IO3-(aq)
Ksp = [La3+] [ IO3-]3
7.5x10-12 = [La3+][0.150]3 = 0.003375[La3+]
[La3+] = 2.22x10-9 M = solubility of La(IO3)3