When 100 mL each of 2.0 × 10-4 M Ca2+ and 2.0 × 10-2 M F- are mixed, what is the remaining Ca 2+ ion concentration and is precipitation complete? The solubility product constant of CaF 2 is 5.3 × 10-9.
A) 4.3 × 10-7 no
B) 5.6 × 10-4 no
C) 1.7 × 10-8 yes
D) 1.7 × 10-6 yes
E) 5.4 × 10-5 no