近年来 ,在化学试题的简答题中出现了一类结论开放型试题 ,这在物质推断题中也相继出现 .下面结合具体实例 ,谈谈解此类试题的分析方法 .　　一、依据反应物的组成顺向发散思考例 1　向某无色溶液中滴加ＢａＣｌ2 溶液和稀硝酸后 ,溶液中出现了白色沉淀 .试推断该无色溶液中可 In recent years, there have been a series of open-ended questions in the short answer questions for chemical test questions. This has also appeared in the question of material extrapolation. Following the specific examples, we will discuss the analytical methods for solving such questions. First, based on the reactants Composition of forward divergent thinking Example 1 After adding BaCl2 solution and dilute nitric acid dropwise to a colorless solution, a white precipitate appeared in the solution. Try to infer the colorless solution can be