化学中的极值问题又叫最值问题,在各类考试中屡屡出现,试题形式多样,学生碰到这类问题时常常感到束手无策。要解决这类问题,关键在于熟练运用极值法来解答相关问题,有的放矢。极值法是极限思维法的简称,就是把研究的对象或变化过程假设成某种理想的极限状态进行分析、推理、判断、计算的一种思维方法。下面就极值法在九年级化学中的应用做几点简单说明 The problem of the extreme value of chemistry, also known as the most valuable problem, appears repeatedly in all kinds of exams. The exam questions are often in various forms. Students often feel helpless when they encounter such problems. The key to solving this kind of problem lies in skillfully using the extreme value method to answer relevant questions and set out the targets. The extreme value method is the abbreviation of the limit thinking method, which is a way of thinking that analyzes or reasoning, judging and calculating the research object or process of change into an ideal limit state. The following extreme value method in ninth grade chemistry to do a few simple instructions