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NaCl ⇆ Na⁺ + C;⁻
0,02 0,02 0,02
Ionisasi Pb(NO₃)₂ :
Pb(NO₃)₂ ⇆ Pb₂⁺ + 2NO₃⁻
0,2 M 0,2 M 0,4 M
Ionisasi PbCl₂ :
PbCl₂ ⇆ Pb²⁺ + 2Cl⁻
Qsp = [Pb²⁺] [Cl⁻]²
Qsp = [0,2] [0,02]²
Qsp = 0,2 x 4 x 10⁻⁴
Qsp = 8 x 10⁻⁵
Karena Qsp > Ksp, maka terjadi endapan