An ultrafilter paper can be made by soaking the filter paper in a colloidal solution, hardening by formaldehyde and then finally drying it. As this is slow process, pressure or suction is applied to speed it up.
Answer: This is the process of separating colloidal particles from the soluble solutes(impurities) using specially prepared filters, which are permeable to all substances except the colloid. ... The colloidal particles left on the ultra-filter paper are stirred with fresh dispersion medium(solvent) to form a pure colloid.
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An ultrafilter paper can be made by soaking the filter paper in a colloidal solution, hardening by formaldehyde and then finally drying it. As this is slow process, pressure or suction is applied to speed it up.
Explanation:
Answer: This is the process of separating colloidal particles from the soluble solutes(impurities) using specially prepared filters, which are permeable to all substances except the colloid. ... The colloidal particles left on the ultra-filter paper are stirred with fresh dispersion medium(solvent) to form a pure colloid.