Final answer:
NaCl salt dissolves in distilled water through a process called dissociation, in which the polar water molecules surround and pull apart the sodium and chloride ions, forming a solution.
Step-by-step explanation:
The dissolution of NaCl salt in distilled water occurs through a process known as dissociation. When NaCl is dissolved in water, the polar water molecules attract the positive sodium ions (Na+) and the negative chloride ions (Cl¯). The water molecules surround these ions and pull them away, separating them from each other and forming a solution.