Absorption in chemistry refers to a process in which one substance is taken up into the structure of another substance. This typically involves a solute being absorbed by a solvent, leading to a homogeneous mixture, or it might involve gas or liquid being absorbed by a solid. In a more specific context, absorption can occur in various scenarios: 1. **Liquid-Liquid Absorption**: In this case, a solute from one liquid is absorbed into another liquid phase.
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Absorption takes a chemical substance into a material's bulk, as when carbon dioxide dissolves in water. Adsorption instead concerns accumulation at a boundary. Bulk uptake and interfacial accumulation can coexist; total uptake alone does not separate their contributions. This use of absorption concerns material uptake, whereas absorbance describes attenuation of electromagnetic radiation.