Calculate the Concentration of Iodate Ions in a Saturated Solution

Calculate the concentration of iodate ions in a saturated solution of barium iodate, Ba(IO₃) ₂. The K_sp = 1.5 × 10^-9.

A) 1.4 × 10^-3 M
B) 2.3 × 10^-3 M
C) 7.2 × 10^-4 M
D) 3.9 × 10^-5 M
E) 7.7 × 10^-5 M