The Concentration of Calcium Carbonate in a Saturated Aqueous Solution $6.71 \times 10 ^ { - 5 }$

Multiple Choice

The concentration of calcium carbonate in a saturated aqueous solution at 25°C is $6.71 \times 10 ^ { - 5 }$ M. What is the K_sp of this sparingly soluble salt?

A) $4.5 \times 10 ^ { - 9 }$
B) $1.21 \times 10 ^ { - 12 }$
C) $5.47 \times 10 ^ { - 16 }$
D) $8.19 \times 10 ^ { - 3 }$
E) $4.06 \times 10 ^ { - 2 }$