• Water typically dissolves many ionic compounds and polar molecules.
  • Nonpolar molecules such as those found in grease or oil do not dissolve in water.
  • Water is attracted to the sodium chloride crystal because water is polar and has both a positive and a negative end.
  • The action of the polar water molecules takes the crystal lattice apart.
  • The individual ions are then surrounded by solvent particles in a process called solvation.
  • Hydration helps to stabilize aqueous solutions by preventing the positive and negative ions from coming back together and forming a precipitate.
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