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Why is it essential to wash the precipit...

Why is it essential to wash the precipitate with water before estimating it quantitatively?

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Some amount of the electrolytes mixeed to form the precipitate remain adsorbed on the surface of the particles of the precipitate. Hence, it is essential to wash the precipitate with water to remove the sticking electrolytes (or any other impurities)n before estimating it quantitatively.
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