hitung Fe(OH)2 (ksp 8.10pangkat-10) dlm a. larutan FeCl2 2.10pangkat-10 M b. larutan NaOH ber pH 10Mhon bntuannya ya. n tlong d jwb yg bnar...

Ksp = [Fe2+].[OH-]^2

a. 8.10^-10 = 2.10^-10 [OH-]^2
[OH-] = 2 M

b. pH=10 -----> pOH = 4 ----> [OH-] 10^-4

8.10^-10 = [Fe2+]. (10^-4)^2
[Fe2+] = 0.08 M