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我们经过实验,Cu-Zn原电池可使灯泡发亮,这一实验的改进在课堂演示中可使全班同学清楚地看到,引起了学生很高的兴趣,起到了很好的演示效果。具体制法如下: 混酸的配制:用98％的浓硫酸与水以体积 比1:5混合,制得约27％的稀硫酸溶液;再用此 稀硫酸与37％的浓盐酸,体积比1:1混合而成。 原电池极板的制做:铜片长13cm,宽4cm, 厚不限。锌片规格与铜片相同或略小一点无
We have experimented that the Cu-Zn primary battery can make the light bulb shine. The improvement of this experiment can make the whole class clearly see in the classroom demonstration, aroused students’ high interest and played a very good demonstration effect. The specific preparation method is as follows: Preparation of mixed acid: Mixing 98% of concentrated sulfuric acid and water in a volume ratio of 1:5 to obtain about 27% dilute sulfuric acid solution; then use this dilute sulfuric acid and 37% concentrated hydrochloric acid, volume ratio 1 : 1 mixed. The original battery plate is made of: copper length 13cm, width 4cm, unlimited thickness. The zinc specification is the same or slightly smaller than the copper