The solubility of manganese(II)carbonate is 5.4 × 10^-4 g/L.What is the solubility product constant for manganese(II)carbonate?

Question

Quizplus · Accepted Answer

The solubility product constant (Ksp) for manganese(II) carbonate, MnCO3, can be calculated from its solubility. MnCO3 dissociates into Mn^2+ and CO3^2- ions in solution. Given the solubility is 5.4 × 10^-4 g/L, we first convert this to moles per liter (molarity, M) using the molar mass of MnCO3 (approximately 114.95 g/mol). This gives a solubility of about 4.7 × 10^-6 M. Since the dissociation produces one mole of Mn^2+ and one mole of CO3^2- for each mole of MnCO3 that dissolves, the concentrations of Mn^2+ and CO3^2- are each 4.7 × 10^-6 M in a saturated solution. The Ksp is the product of these concentrations: (4.7 × 10^-6)^2 = 2.2 × 10^-11.

The Solubility of Manganese(II)carbonate Is 5