一、红砖中氧化铁成分的检验本实验要求设计实验方案进行红砖中氧化铁成分的检验 ,同学们根据氧化铁的性质将其溶于盐酸转化为Ｆｅ3 + ,然后根据Ｆｅ3 + 的检验证明红砖成分中含有氧化铁 ,据此 ,同学们设计出两种实验方案。具体如下 :方案一 :取红砖样品 ,用盐酸溶解 ,取上层清 I. Inspection of Iron Oxide in Red Brick This experiment requires the design of an experimental program for the inspection of iron oxide in red brick. The students converted the dissolved iron oxide into Fe3 + according to the properties of iron oxide, and then proved it according to the test of Fe3 +. The red brick composition contains iron oxide. Based on this, the students designed two experimental programs. The details are as follows: Scheme 1: Take red brick sample, dissolve with hydrochloric acid, take the supernatant