The polarity of water allows it to create a hydration layer that prevents salt from coming back out of solution after it has been dissolved.

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Quizplus · Accepted Answer

Water's polarity enables it to surround and separate individual ions from a salt crystal, effectively dissolving it. The hydration layer around each ion prevents them from reassociating and coming out of solution, keeping the salt dissolved.

The Polarity of Water Allows It to Create a Hydration