溶液的pH是高考中重现率高的重点知识,从2004年全国各地的高考化学试题看,有关溶液pH的常见题型主要是选择题。题目难度适当,推理性有所增强,题设条件变化较多,正向、逆向思维,数字与字母交替出现,比较和计算都有。因此除正确理解有关溶液pH的概念外,还要注意利用化学平衡理论分析研究弱电解质的电离情况,依据有关溶 The pH of the solution is the key to the high recurrence rate in the college entrance examination. From the chemical examination questions in the college entrance examinations across the country in 2004, the common questions about solution pH are mainly multiple-choice questions. The difficulty of the title is appropriate, the reasoning is enhanced, the conditions for the title change more, the forward and reverse thinking, the numbers and the letters alternate, the comparison and the calculation. Therefore, in addition to a correct understanding of the concept of solution pH, we must pay attention to the use of chemical equilibrium theory to analyze the weak electrolyte ionization conditions, according to the relevant