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誰都用過試紙,中学裹就用過石蕊試紙,还有些用過澱粉碘化鉀試紙。在更進一步的學習中遇到更多的各式各樣的試紙。但是誰問過:為什麼要用試紙呢?怎樣才能很好地使用試紙呢?將來試紙在分析化學上要起多盛大的作用呢?今天我們就來研究這幾個問題。在試紙上進行反應,其實就是把化學反應從試管裏搬到濾紙上來作,有什麽不同呢?按反應的本質來說,凡是兩個化合物在試管裏能起的作用,在濾紙上自然也一樣的起作用,但是除此以外,在紙上起化學反應,還有一些特點。首先要考慮紙的化學活潑性。紙是由纖維組
Who used the test paper, high school wrapped litmus test paper, and some used starch potassium iodide test paper. In the further study encountered more variety of test strips. But who asked: Why test strips? How to use test strips well? In the future, how important should test strips be in analytical chemistry? Today, we will study these questions. Reaction on the test paper, in fact, the chemical reaction is moved from the test tube to filter paper for what is the difference? According to the nature of the reaction, any two compounds can play a role in the test tube, the same naturally on the filter paper , But other than that, chemical reaction on the paper, there are some characteristics. The first thing to consider is the paper’s chemical activity. Paper is made of fiber groups