Exhibit 14-7 Consider Dissolving LaF 3 in Water as Shown

Exhibit 14-7 Consider dissolving LaF 3 in water as shown below to answer the following question(s) :
LaF₃ (s) La³⁺ (aq) + 3 F - (aq) K sp = 2.0*10^{- 19}
-Refer to Exhibit 14-7. What is the molar solubility of LaF 3 in a solution that contains 0.035 M KF?

A) [LaF₃] = 5.71×10 ^{- 18} M
B) [LaF₃] = 1.73×10 ^{- 16} M
C) [LaF₃] = 4.66×10 ^{- 15} M
D) [LaF₃] = 1.40×10 ^{- 14} M
E) [LaF₃] = 9.28×10 ^{- 6} M