Answer:
Step-by-step explanation:
The solubility product constant, Ksp, for FeCO3 can be calculated using the formula:
Ksp = [Fe2+][CO32-]
However, we need to first determine the concentration of Fe2+ and CO32- ions in the solution based on the given solubility of FeCO3.
FeCO3(s) ⇌ Fe2+(aq) + CO32-(aq)
Let x be the concentration of Fe2+ and CO32- ions in the solution.
Then, using the balanced equation, we can write:
[Fe2+] = x
[CO32-] = x
The solubility of FeCO3 can be expressed as:
Ksp = [Fe2+][CO32-] = x * x = x^2
Substituting the given solubility of FeCO3 (5.9x10^-6 mol/L) for x, we get:
Ksp = (5.9x10^-6 mol/L)^2 = 3.481x10^-11
Therefore, the answer is C. 3.5x10^-11.