Question

Will Fe(OH)3 precipitate in a solution that is 0.00060 M NaOH, if the solution is also made to be 0.0010 M in Fe3+? For Fe(OH)3,

Ksp = 6.8×10−36.
a) Yes
b) No

Answer 1

Fe(OH)3 will not precipitate in the solution.

Step-by-step explanation:

To determine if Fe(OH)3 will precipitate in the solution, we need to compare the ion product ([Fe3+][OH-]³) with the solubility product constant (Ksp). The ion product is calculated by multiplying the concentrations of Fe3+ and OH- raised to their stoichiometric coefficients (1 and 3, respectively). In this case, the concentration of Fe3+ is 0.0010 M, and the concentration of OH- is 0.00060 M (from the NaOH solution). So, the ion product is (0.0010)(0.00060)³. If this value is greater than the Ksp of Fe(OH)3 (6.8×10−36), then a precipitate will form. In this case, the calculated ion product is smaller than the Ksp, so Fe(OH)3 will not precipitate.