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文章从两个具体实验谈起:1)二氧化锰和盐酸制取氯气、盐酸浓度的适宜条件。2)银从氢碘酸中置换出氢气的可能性。为了便于说明,我们用E—C图解法进行分析。
Article from two specific experiments: 1) manganese dioxide and hydrochloric acid to obtain chlorine, hydrochloric acid concentration of the appropriate conditions. 2) The possibility of silver replacing hydrogen from hydriodic acid. For ease of explanation, we use E-C graphical analysis.