diantara senyawa berikut, yang memiliki kelarutan paling besar adalah (dinyatakan dalam mol L^-1). A. BaCrO4(Ksp=1,2×10^-10) B. BaSO4(Ksp=1,1×10^-10) C. AgCl(Ks

Kelarutan & Hasilkali Kelarutan
Kimia XI

[a]
BaCrO₄ ⇄ Ba²⁺ + CrO₄²⁻
     s            s          s
Ksp = [Ba²⁺] [CrO₄²⁻]
Ksp = [ s ] [ s ]
Ksp = s²
s = √ Ksp
s = √ [1,2 x 10⁻¹⁰]
s = 1,1 x 10⁻⁵ mol/liter

[b]
BaSO₄ ⇄ Ba²⁺ + SO₄²⁻
     s            s          s
Ksp = [Ba²⁺] [SO₄²⁻]
Ksp = [ s ] [ s ]
Ksp = s²
s = √ Ksp
s = √ [1,1 x 10⁻¹⁰]
s = 1,05 x 10⁻⁵ mol/liter

[c]
AgCl ⇄ Ag⁺ + Cl⁻
   s         s       s
Ksp = [Ag⁺] [Cl⁻]
Ksp = [ s ] [ s ]
Ksp = s²
s = √ Ksp
s = √ [1,8 x 10⁻¹⁰]
s = 1,34 x 10⁻⁵ mol/liter

[d]
Ag₂CrO₄ ⇄ 2 Ag⁺ + CrO₄²⁻
      s              2s        s
Ksp = [Ag²⁺]² [CrO₄²⁻]
Ksp = [ 2s ]² [ s ]
Ksp = 4s³
s = ∛ [Ksp/4]
s = ∛ [(1,1 x 10⁻¹²)/4]
s = 6,5x 10⁻⁵ mol/liter

[e] CaF₂ ⇄ Ca²⁺ + 2 F⁻
        s          s         2s
Ksp = [Ca²⁺] [F⁻]
Ksp = [ s ] [ 2s ]²
Ksp = 4s³
s = ∛ [Ksp/4]
s = ∛ [(3,4 x 10⁻¹¹)/4]
s = 2,04 x 10⁻⁴ mol/liter ⇒ kelarutan terbesar