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在中学八年级时,通过接触法制备硫酸的研究,获得了关于催化作用和催化剂的一般知识。在中学化学课程中,只进行氧化二氧化硫成为硫酐和其他催化反应定性方面的试验。在课外进行关于催化剂的定量试验,是适宜作为进一步研究材料的。定量试验此定性试验要优越是众所周知的。在这样工作中,可将不同催化剂彼此进行比较、对照,从而决定它的相对活度。除此以外,在实验中,学生可确信所谓负性催化剂的作用。不同催化剂的定量测定,用过氧化氢分解反应为例是较便利的。推荐使用30％的过氧化氢(强双氧水)溶液,但也可似使用比较稀的溶液。提供的仪器圖示是很简单的。在一升的烧瓶(1)
In the eighth grade of secondary school, the study of the preparation of sulfuric acid by the contact method obtained general knowledge about catalysis and catalysts. In secondary school chemistry courses, only the oxidation of sulfur dioxide to sulfur anhydride and other catalytic reactions qualitative test. Carrying out quantitative tests on extra-curricular catalysts is suitable as a further study material. Quantitative tests The superiority of this qualitative test is well known. In doing so, different catalysts can be compared to each other and compared to determine their relative activity. In addition, during the experiment, students were convinced of the so-called negative catalyst effect. The quantitative determination of different catalysts, hydrogen peroxide decomposition reaction is taken as an example is more convenient. It is recommended to use a 30% solution of hydrogen peroxide (strong hydrogen peroxide), but you may also want to use a dilute solution. The illustration of the instrument provided is simple. In a one liter flask (1)