Hitunglah kelarutan senyawa berikut ini dalam air jika diketahui kspnya: a. AgCrO₄ (Ksp Ag₂CrO₄ = 1,1 x 10 ⁻¹²) b. Fe(OH)₂ (Ksp Fe(OH)₂ 8 x 10⁻¹⁶) c. PbCrO₄ (Ksp PbCrO₄ - 2 x 10⁻¹⁴) d. PbCl₂ (Ksp PbCl₂ = 1,7 x 10⁻⁵)
Amaldoft
A. Ag2CrO4 ⇔ 2Ag+ + CrO4 2- --> Ksp = 4s^3 s = ∛2,75 x 10^-13 = 6,5 x 10^-5mol/L B. Fe(OH)2 ⇔ Fe2+ + 2OH- --> Ksp = 4s^3 s =∛2 x 10^-16 = 5,84 x 10^-6mol/L C. PbCrO4 ⇔ Pb2+ + CrO4 2- --> Ksp = s^2 s = √2 x 10^-14 = 1,4 x 10^-7 mol/L D. PbCl2 ⇔ Pb2+ + 2Cl- --> Ksp = 4s^3 s = ∛4,25 x 10^-6 = 1,61 x 10^-2mol/L
--> Ksp = 4s^3
s = ∛2,75 x 10^-13
= 6,5 x 10^-5 mol/L
B. Fe(OH)2 ⇔ Fe2+ + 2OH-
--> Ksp = 4s^3
s =∛2 x 10^-16
= 5,84 x 10^-6 mol/L
C. PbCrO4 ⇔ Pb2+ + CrO4 2-
--> Ksp = s^2
s = √2 x 10^-14
= 1,4 x 10^-7 mol/L
D. PbCl2 ⇔ Pb2+ + 2Cl-
--> Ksp = 4s^3
s = ∛4,25 x 10^-6
= 1,61 x 10^-2 mol/L