What Is the Molar Solubility of MgF₂ in a 0

Multiple Choice

What is the molar solubility of MgF₂ in a 0.40 M NaF solution? For MgF₂,K_sp = 8.4 × 10^-8.

A) 1.0 × 10^-7 M
B) 1.4 × 10^-4 M
C) 2.1 × 10^-7 M
D) 7.1 × 10^-4 M
E) 5.3 × 10^-7 M