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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 mixed to from the precipitate ramins adsorbed on the surface of the particles of the precipitate. Hence, it is essential to wash the pecipitate with water to remove the sticking electrolytes (or any other impurities) before estimating it quantitatively.
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