Answer:
The Ksp for this compound is 3.24 * 10^-8
Explanation:
Step 1: Data given:
Molar solubility of MgCO3 = 1.8 * 10^-4 mol /L
Step 2: Calculate molarity
For an insoluble compound, its molar solubility tells you how many moles of the compound can be dissolved per liter of aqueous solution before reaching saturation.
In this case, it means that we can only dissolve 1.8 * 10^-4 moles in a liter of water at that temperature.
Moles Mg^2+ = 1.8 * 10^-4 moles
Moles CO3^2- = 1.8 * 10^-4 moles
Since we're working with one liter of solution, we can say the molarity:
[Mg^2+] = 1.8 * 10^-4 M
[CO3^2-] = 1.8 * 10^-4 M
Step 3: Calculate Ksp
Ksp = [Mg^2+]*[CO3^2-]
Ksp = 1.8 * 10^-4 * 1.8 * 10^-4
Ksp = 3.24 * 10^-8
The Ksp for this compound is 3.24 * 10^-8
