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

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

Solution:

When a substance gets precipitated, some ions that combine to form the precipitate get adsorbed on the surface of the precipitate. Therefore, it becomes important to wash the precipitate before estimating it quantitatively in order to remove these adsorbed ions or other such impurities.

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