Solubility Product Constant: Ag2C2O4
What is the expression for the solubility product constant of Ag2C2O4?
Which of the following represents the correct form of the solubility product constant (Ksp) for Ag2C2O4?
- Ksp = [Ag+][C2O4²-]
- Ksp = (Ag +)? [C2O4]
- Ksp = [Ag2+)?[C2O/²1
- Ksp = [Ag+][C2O4?]
Answer:
The correct expression for the solubility product constant (Ksp) of Ag2C2O4 is: Ksp = [Ag+][C2O4²-]
The Ksp for the solubility of the ionic compound Ag2C2O4, or silver oxalate, is defined as Ksp = [Ag+]²[C2O4²-]. Each concentration of ions is raised to the power of their stoichiometric coefficient in the balanced equation.
The solubility product constant, Ksp, is a value that quantitatively describes the solubility of an ionic compound. For the ionic compound Ag2C2O4, or silver oxalate, the equation for its dissociation into ions in solution is Ag2C2O4 ↔ 2Ag+ + C2O4²-. From this equation, the expression for the solubility product constant, Ksp, is [Ag+]²[C2O4²-]. The brackets refer to concentrations in moles per liter.
Therefore, the correct form of Ksp is Ksp = [Ag+]²[C2O4²-]. This represents the product of the concentrations of each ion in solution, each raised to the power of their stoichiometric coefficient, when the solution is at equilibrium.