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White precipitate refers to a solid compound that forms and separates from a solution when two solutions are mixed. Milky in salt analysis, on the other hand, usually refers to the formation of a colloidal suspension, where very fine particles of a substance are dispersed throughout a liquid. These particles scatter light, giving the solution a milky or cloudy appearance. In salt analysis, a milky appearance can sometimes indicate the presence of certain ions, such as silver ions (Ag+) or chloride ions (Cl-), which can form insoluble precipitates that appear milky or cloudy.