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反应物间一对多的化学反应常有“平行反应”和“竞争反应”两类,平行反应主要指多个反应相互间没有影响可同时进行;而竞争反应是指由于反应能力不同,多个反应按一定的先后顺序逐次进行.如何把握一种反应物量的变化引起其他成分物质的量的相应变化就成为解题的关键.本文拟用图像法阐明这类问题.一、有两种以上离子参与的氧化还原体系例1向含有Fe~(2+)、I~-、Br~-的溶液中通入适量氯气,溶液中各种离子物质的量变化如图.有关说法不正确的是
One to many chemical reactions between reactants often “parallel reaction ” and “competitive reaction ” two types of parallel reaction mainly refers to multiple reactions without affecting each other can be simultaneously; and competitive reaction refers to the reaction capacity Different, a number of reactions in a certain order one after another.How to grasp how a change in the amount of reactants caused the corresponding changes in the amount of other components of the material becomes the key to solving the problem.This paper intends to use image method to clarify this type of problem. Redox system with two or more ions involved Example 1 A suitable amount of chlorine gas was introduced into a solution containing Fe 2 +, I- and Br ~ -, and the amount of various ionic substances in the solution changed as shown in the figure. the correct one is