The solubility product expression for Sn(OH)2 is

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The solubility product expression for Sn(OH)2 is

When a solid dissolves, the solubility product reflects how the solid splits into its ions according to the balanced dissolution: Sn(OH)2(s) ⇌ Sn2+(aq) + 2 OH−(aq). The Ksp is the product of the activities of these ions, each raised to the power of its coefficient in the equation: Ksp = a(Sn2+) × a(OH−)^2. In dilute solutions, activities are approximated by concentrations, so Ksp ≈ [Sn2+][OH−]^2. That’s why the correct expression is [Sn2+][OH−]^2. The other forms don’t fit because they either use the wrong species or the wrong hydroxide exponent, which contradicts the dissolution stoichiometry.

When a solid dissolves, the solubility product reflects how the solid splits into its ions according to the balanced dissolution: Sn(OH)2(s) ⇌ Sn2+(aq) + 2 OH−(aq). The Ksp is the product of the activities of these ions, each raised to the power of its coefficient in the equation: Ksp = a(Sn2+) × a(OH−)^2. In dilute solutions, activities are approximated by concentrations, so Ksp ≈ [Sn2+][OH−]^2. That’s why the correct expression is [Sn2+][OH−]^2. The other forms don’t fit because they either use the wrong species or the wrong hydroxide exponent, which contradicts the dissolution stoichiometry.

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