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In chemistry, a protic solvent is a solvent that has a hydrogen atom bound to an oxygen (as in a hydroxyl group) or a nitrogen (as in an amine group). In general terms, any solvent that contains labile H+ is called a protic solvent. The molecules of such solvents readily donate protons (H+) to reagents. Conversely, aprotic solvents cannot donate hydrogen. ==Polar protic solvents== Polar protic solvents are often used to dissolve salts. In general, these solvents have high dielectric constants and high polarity. Common characteristics of protic solvents : * solvents display hydrogen bonding * solvents have an acidic hydrogen (although they may be very weak acids such as ethanol) * solvents dissolve salts * * cations by unshared free electron pairs * * anions by hydrogen bonding Examples include water, most alcohols, formic acid, hydrogen fluoride, and ammonia. Polar protic solvents are favorable for SN1 reactions, while polar aprotic solvents are favorable for SN2 reactions. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Protic solvent」の詳細全文を読む スポンサード リンク
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