Absorption Definition in the Chemistry Glossary

sponge in bowl of water

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Definition: Absorption is the process by which atoms, molecules, or ions enter a bulk phase (liquid, gas, solid). Absorption differs from from adsorption, since the atoms/molecules/ions are taken up by the volume, not by surface.

Examples: absorption of carbon dioxide by sodium hydroxide

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Helmenstine, Anne Marie, Ph.D. "Absorption Definition in the Chemistry Glossary." ThoughtCo, Aug. 28, 2020, thoughtco.com/definition-of-absorption-chemistry-605818. Helmenstine, Anne Marie, Ph.D. (2020, August 28). Absorption Definition in the Chemistry Glossary. Retrieved from https://www.thoughtco.com/definition-of-absorption-chemistry-605818 Helmenstine, Anne Marie, Ph.D. "Absorption Definition in the Chemistry Glossary." ThoughtCo. https://www.thoughtco.com/definition-of-absorption-chemistry-605818 (accessed April 18, 2021).