J.R. S. answered 04/25/20
Ph.D. in Biochemistry with an emphasis in Neurochemistry/Neuropharm
Pb3(AsO4)2(s) <==> 3Pb2+(aq) + 2AsO43-(aq)
Ksp = [Pb2+]3[AsO43-]2
[Pb2+] = 3 x 3.34x10-8 = 1.00x10-7
[AsO43-] = 2 x 3.34x10-8 = 6.68x10-8
Ksp = (1.00x10-7)3(6.68x10-8)2
Ksp = 4.46x10-36