Applications of Colloidal Properties

Activated charcoal has an enormous surface area, approximately 1 million square centimeters per gram in some samples. Hence, charcoal is very effective in selectively adsorbing the polar molecules of some poisonous gases and is therefore used in gas masks. Charcoal can be used to adsorb impurities from liquids as well as from gases, and large amounts are used to remove substances that have objectionable tastes and odors from water supplies. In sugar refineries, activated charcoal is used to adsorb colored impurities from the raw sugar solutions. [Pg.374]

A life-saving application of dialysis has been the development of artificial kidneys. The blood of a patient suffering from partial kidney failure is passed through the artificial kidney machine for several hours, during which time the soluble waste products are removed by dialysis. [Pg.375]

They interact with acids to form water and a salt. Arrhenius definition of acids and bases [Pg.375]

Acids contain excess ions in aqueous solutions. Bases contain excess OH ions in aqueous solutions. Bronsted-Lowry definition of acids and bases [Pg.375]

Acids react with metals above hydrogen in the activity series to form hydrogen gas and a salt. Acids react with bases to form water and a salt (neutralization reaction). [Pg.375]

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