Welcome to Geekswipe Curiosity. When NaCl dissolves in water to form Na+ and Cl–, depending on the ions that are already in the water medium, there would be a lot of possibilities for the two ions to bond with other counterions to become neutral again. At room temperature and pressure, most of such reactions would be soluble in water for Na+ and Cl–. However, Lead ion and chloride ion for example, would result in a partially soluble precipitate of lead chloride. And silver ion with chloride ion would result in an insoluble precipitate. You can refer this solubility chart for all possible reactions.
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