At 25 °C the following constants are given:
• Zn(OH)₂, Kₛₚ = 3.0 × 10⁻¹⁷
• CaCO₃, Kₛₚ = 3.3 × 10⁻⁹
• SrSO₄, Kₛₚ = 2.5 × 10⁻⁷
• H₂CO₃ (first dissociation), Kₐ = 4.3 × 10⁻⁷
Provide two separate rankings of the three salts by molar solubility, one for pH 7.0 and one for pH 14.0. List each ranking in the form “highest > middle > lowest.”