SAT考试是美国高中生进入美国大学的标准入学考试，包括SAT1和SAT2。SAT2是专项测验，有数学、物理、化学、生物、外语等，大部分为选择题，是可以选科的。今天我们来学习SATII化学专题分析 The Chemistry of Acids and Bases，希望对大家的复习有所帮助。

　　Acid-Base Theories

　　Let’s start our discussion of acids and bases by defining some terms that are essential to the topics that follow.

　　Arrhenius acids and bases are:

　　acid—a substance that increases the concentration of protons (H+) in water

　　base—a substance that increases the concentration of hydroxide ions in water (OH-)

　　These definitions are limited to aqueous solutions.

　　Brønsted and Lowry acids and bases as:

　　acid—a substance that donates a proton to another substance

　　base—a substance that accepts a proton

　　These definitions can also apply to reactions that are not aqueous, so they are more accurate.

　　Lewis acids and bases are:

　　acid—a substance that accepts an electron pair

　　base—a substance that donates an electron pair

　　Here are some other terms that you’ll need to be familiar with:

　　hydronium (H3O+)—H+ riding “piggyback” on a water molecule; water is polar, and the positive charge of the naked proton is greatly attracted to one of the negative electron pairs on adjacent oxygen

　　monoprotic—describes acids that can donate one H+

　　diprotic—describes acids that can donate two H+ ions

　　polyprotic—describes acids that can donate more than one H+ ion

　　amphiprotic—describes a substance that can act as either an acid or a base. This means it can either lose a proton or gain one. Water is amphiprotic: it can form either a hydroxide ion or a hydronium ion. Other examples of amphiprotic substances are , ,

　　以上所介绍的就是SATII化学专题分析 The Chemistry of Acids and Bases，大家在复习的时候可以进行参考。