82) Ksp = 2.5 x 10-10 [Ba2+] = 2.0 x 10-8
Ba(MnO4)2(s) Ba2+(aq) + 2MnO4-(aq)
Ksp = [Ba2+] x [MnO4-]2
2.5 x 10-10 = 2.0 x 10-8 x [MnO4-]2
[MnO4-] = 0.11 M
[KMnO4] = 0.11 mol MnO4-/L x 1 mol KMnO4/1 mol MnO4- = 0.11 M