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Calcium hydroxide, Ca(OH)₂, is a slightly soluble salt with a Kₛₚ = 6.5 x 10⁻⁶. In which one of the following will calcium hydroxide have the highest solubility? Select one:
-0.10 M NaOH
- 0.10 M Ca (NO₃)₂
- PURE WATER
- 0.10 M HCI