Glossary

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semipermeable membrane: A membrane that selectively permits some species to pass through while rejecting others; often one that permits solventThe substance to which a solute is added to make a solution. molecules to pass through, but not large molecules such as proteins.

Term of the Day

The extent to which a species in solutionA mixture of one or more substances dissolved in a solvent to give a homogeneous mixture. ionizes. Often applied to the ionizationA process in which an atom, molecule, or negative ion loses an electron; a process in which a covalent molecule reacts with a solvent to form positive and negative ions; for example, a weak acid reacting with water to form its conjugate base (an anion) and a hydrogen (hydronium) ion. reactions of acids and bases.