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Ksp = [Ag⁺] [Cl⁻]
= [s] [s]
= s²
= (10⁻⁵)²
= 10⁻¹⁰
CaCl₂ ⇆ Ca²⁺ + 2Cl⁻
0,05 0,05 0,1 M
[Cl⁻] = 0,1 M
AgCl ⇆ Ag⁺ + Cl⁻
Ksp = [Ag⁺] [Cl⁻]
10⁻¹⁰ = [s] [0,1]
s = 10⁻¹⁰/0,1
s = 10⁻⁹
Jadi, kelarutannya adalah 10⁻⁹ (Jawaban B)