Chromium(III) hydroxide, Cr(OH)3 has a Ksp of 6.31 x 10⁻31 at 25°C. What is the molar solubility of Cr(OH)3 in g/L after 0.0500 mg of solid chromium(III) hydroxide is placed in 1.00 L of alkaline solution?
a) 3.16 x 10⁻18 g/L
b) 6.31 x 10⁻15 g/L
c) 1.26 x 10⁻11 g/L
d) 2.51 x 10⁻8 g/L