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近年来,我国高考科目设置作了较大改革,单就化学科目而言,就既有传统的化学单科考试的全国卷、上海卷,也有理科综合能力测试中的化学内容和综合能力测试中的化学内容。随着改革的发展,高考化学科试题的品质不断提高,具有表现在以下几个方面。一、重视在综合背景下考查化学知识在综合背景下认识化学、考察化学,更能认清化学的重要性及其核心地位。知识综合化是新一轮课程改革的重要内容。例1.由实验得知,由电解法将电解液中的金属离子还原为金属单质时,电极所通过的电量 Q 正比于金属的物质的量 n 和金属化合价 a 的乘积,其比例系数 F 是一个恒量,称为法拉第常数,它与金属的种类无关。
In recent years, major reforms have been made in China’s college entrance examination subjects. In terms of chemical subjects, there are both the national and the Shanghai volumes of the traditional chemical examinations, as well as the chemical content and comprehensive ability tests in science comprehensive ability tests. Chemical content. With the development of the reform, the quality of the examination subjects in the college entrance examinations has been continuously improved, with the following aspects. I. Pay attention to examining chemical knowledge in a comprehensive context Understand the chemistry and study chemistry in a comprehensive context to better understand the importance and core status of chemistry. Knowledge integration is an important part of the new round of curriculum reform. Example 1. It is known from experiments that when the metal ions in the electrolyte are reduced to metal elements by electrolysis, the amount of electricity Q passed through the electrodes is proportional to the product of the amount of metal material n and the metal valence a, and the proportionality coefficient F is A constant, called the Faraday constant, has nothing to do with the type of metal.