What are the commonly used equipment for filtration? That's not Laboratory filtration, it's industry
) after filtering operation can not remove the soluble solid was not pure water, because the water is alum, bacteria and other soluble impurities; so the answer is: No; water containing alum, bacteria and other soluble impurities;
alum dissolved in water to form colloidal particles can adsorb small insoluble solids, the formation of large particles is easy to precipitate, use glass rod drainage requires filtering operation; so the answer is: the adsorption and precipitation of the glass rod;; drainage;
The commonly used laboratory filter paper filtering layer, can also use gauze and sand as filter layer in life
the "two low" refers to the edge of the filter below the funnel, the liquid level is below the edge of filter paper the answer is: the filter paper; the edge below the funnel; the filter level is lower than the edge.
