| 1.The elements are sometimes grouped according to their properties.译文： 元素有时可根据他们的性质成组。 | |
| | 2.In the International Union of Pure and Applied Chemistry (IUPAC) system of chemical nomenclature, the name of an alkene is derived from the name of the corresponding alkane by replacing the -ane alkane suffix with -ene and, if necessary, adding a prefix to indicate the location of the double bond in the molecule.译文：在国际理论和应用化学联合会化学命名法系统中，烯烃的名称来源于相应的烷烃，用-ene取代烷烃的后缀-ane，如果必要的话，添加一个前缀表示分子中双键的位置。 | |
| | 3.A suitable indicator should be chosen, preferably one that will experience a change in color (an end point) close to the equivalence point of the reaction.译文： 应该选择合适的指示剂，最好是选择那种在反应终点会改变性质的物质。 | |
| | 4.This is best achieved by washing a hanging drop from the tip of the burette into the flask right at the end of the titration to achieve a drop that is smaller in volume than what can usually be achieved by just dripping solution off the burette.译文：这一目标（指反应终点）可通过在滴定即将结束时，利用蒸馏水清洗悬挂于滴定管尖端的液滴并汇入烧瓶来实现，该液滴体积上要比通常从滴定管滴下的液滴小得多。 | |
| | 5.Each of these compounds contains at least one ring that consists of six carbon atoms, each joined to at least two other carbon atoms, and each joined to adjacent carbon atoms by one single and one double bond.译文： 这些化合物中的每一个至少包含一个六个碳原子组成的环，每个碳原子连接着至少两个其他的碳 | |
| | 6.The end point reaches when the indicator just changes color permanently.译文：当指示剂刚变色时就达到了滴定终点。 | |
| | 7.Molecules are made up of two or more atoms, either of the same element or of two or more different elements, joined by one or more covalent chemical bonds.译文：化合物由两个或两个以上原子组成，同种元素或不同的两种及两种以上元素的原子之间依靠一或多个离子键结合。 | |
| | 8.The equivalence point of the reaction, the point at which equivalent amounts of the reactants have reacted, will have a pH dependent on the relative strengths of the acid and base used.译文：反应的等当点，即为反应物等量反应的那一点，其pH值依赖于使用的酸和碱的相对强度。 | |
| 1.equivalence point | |
| | 2. in the proper proportions | |
| | 3.Standard Solution | |
| | 4.弱碱 | |
| | 5.Bunsen burner | |
| | 6.碱式滴定管 | |
| | 7.atomic weight | |
| | 8.锥形瓶 | |
| | 9.chemical symbol | |
| | 10.triple bonds | |
| | 11.芳香族化合物 | |
| | 12.脂肪酸 | |
| | 13.positively charged | |
| | 14.phlogiston theory | |
| | 15.实验装置 | |
|
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