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ksp=7x10⁻⁹
KI=0,2 M
Ditanyakan: s=?
Dijawab:
KI ⇔ K⁺ + I⁻
0,2 M 0,2M 0,2 M
PbI₂ (s)⇔Pb²⁺ (aq)+ 2I⁻ (aq)
--s------------s------------2s----
ksp=[Pb²⁺][I⁻]²
ksp=[s][0,2]²
7x10⁻⁹=0,04s
s=
jadi kelarutannya 1,75x10⁻⁷ mol/L