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*Ksp Ag3PO4 = 2,7 x 10^-19
*[Na3PO4] = 0,01 M
*Kelarutan ?
Ini soal ion senama (sejenis). Terlihat ion senama antara Ag3PO4 dan Na3PO4 adalah ion fosfat (PO4 3-).
Na3PO4 ⇔ 3Na+ + PO4 3-
0,01 0,01 ------> [PO4 3-] = 0,01 M
Ag3PO4 ⇔ 3Ag+ + PO4 3-
Ksp = [Ag+]^3 [PO4 3-]
2,7 x 10^-19 = [Ag+]^3 [0,01]
[Ag+] = ∛2,7 x 10^-17
= 3 x 10^-6 mol/L