In chemistry a protic solvent is a solvent that carries a hydrogen bond between an oxygen as in a hydroxyl group or a nitrogen as in an amine group. More generally, any molecular solvent which contains dissociable H+, such as hydrogen fluoride, is called a protic solvent. The molecules of such solvents can donate an H+ (proton). Conversely, aprotic solvents cannot donate hydrogen bonds.
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Compare with amphiprotic solvent .A solvent that does not act as an acid or as a base; aprotic solvents don't undergo autoprotolysis . Examples are pentane, pet ether, and toluene.