Final answer:
Calcium fluoride (CaF2) does not exhibit pH-dependent solubility at a pH less than 7.00 because it does not react significantly with H+ ions when dissolved.
Step-by-step explanation:
Among the compounds listed, CaF2 (calcium fluoride) does not have a pH-dependent solubility at a pH less than 7.00. This is because calcium fluoride is a sparingly soluble salt that dissolves in water to form Ca2+ and F- ions without involving any significant change in pH. The other compounds listed typically contain either a metallic hydroxide or a complex anion that can react with hydrogen ions, thereby displaying increased solubility in acidic solutions (pH < 7).