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锌与稀硫酸反应能迅速生成氢气,在Zn|ZnSO_4||H_2SO_4|Cu原电池中,理论上铜片上应迅速产生大量气体,可是按教材进行实验却很难在铜片上看到气泡,仅能观察到灵敏电流表的指针发生偏转。为什么实验现象与理论不符?笔者通过实验探究其原因,并据此对实验进行改进,改进后的原电池装置简单,铜片上能迅速产生大量气泡。
Zinc and dilute sulfuric acid reaction can quickly generate hydrogen, in Zn | ZnSO_4 || H_2SO_4 | Cu primary batteries, in theory, should quickly produce large amounts of gas on the copper, but according to the textbook experiment is difficult to see bubbles in the copper, only A pointer to the sensitive ammeter was observed to deflect. Why the experimental phenomenon does not match with the theory? The author explores the reason through the experiment, and accordingly improves the experiment. The improved original battery device is simple, and a large number of bubbles can be rapidly produced on the copper sheet.