Why Would You Expect or Predict Sodium Fluoride to Have

Multiple Choice

Why would you expect or predict sodium fluoride to have the lowest solubility in water compared to the other sodium halide salts?

A) Fluoride has the largest (most negative) enthalpy of hydration of all the halide ions.
B) Fluoride has the smallest (least negative) enthalpy of hydration of all the halide ions.
C) Sodium fluoride has the largest (most negative) lattice energy of all the sodium halides.
D) Sodium fluoride has the smallest molar mass of all the sodium halides.
E) Fluoride is the most basic of all the halide ions and forms HF in aqueous solution.