The solubility of A2X3 is ''s'' mol.dm-3, its solubility product is:
Correct answer: D. 108s5
- A. 4s3
- B. 64s4
- C. 36s5
- D. 108s5
Explanation
The dissociation is A₂X₃ ⇌ 2A³⁺ + 3X²⁻. At equilibrium, [A³⁺] = 2s and [X²⁻] = 3s. The solubility product is Ksp = [A³⁺]²[X²⁻]³ = (2s)²(3s)³ = (4s²)(27s³) = 108s⁵.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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