What Is the Maximum Hydroxide-Ion Concentration That a 0 $\times$ 10^-11 $\times$

Multiple Choice

What is the maximum hydroxide-ion concentration that a 0.027 M MgCl₂ solution could have without causing the precipitation of Mg(OH) ₂? For Mg(OH) ₂,K_sp = 1.8 $\times$ 10^-11.

A) 4.2 $\times$ 10^-6
B) 1.7 $\times$ 10^-4
C) 1.2 $\times$ 10^-8
D) 6.7 $\times$ 10^-9
E) 2.6 $\times$ 10^-5