论文部分内容阅读
一、波动实验。器具:大烧杯一只、250毫升烧杯若干只、250毫升容量瓶一只。药品:过氧化氢、碘酸钾、硫酸、丙二酸、淀粉。方法:配制成下列三种溶液。溶液A:102.5毫升30％H_2O_2用水稀释到250毫升。溶液B:10.7克碘酸钾+2MH_2SO_410毫升用水稀释到250毫升。溶液0:3.9克丙二酸+0.845克硫酸锰+0.075克淀粉。先将淀粉0.075克溶于少量热水中,然后加入3.9克丙二酸,再加入0.845克硫酸锰,再稀释至250毫升。表演时,将A、B、C三种溶液共倒在一只大烧杯中,用玻璃棒搅动,就得出兰色一琥珀色一无色交替进行,时间可达数分钟。
First, the wave experiment. Appliances: One beaker, 250 ml beaker, 250 ml volumetric flask. Drugs: hydrogen peroxide, potassium iodate, sulfuric acid, malonic acid, starch. Method: Prepare the following three solutions. Solution A: 102.5 ml of 30% H 2 O 2 was diluted with water to 250 ml. Solution B: 10.7 g of potassium iodate + 2 M H 2 SO_ 410 ml diluted with water to 250 ml. Solution 0: 3.9 g of malonic acid + 0.845 g of manganese sulfate + 0.075 g of starch. 0.075 g of starch was first dissolved in a small amount of hot water, then 3.9 g of malonic acid was added, and then 0.845 g of manganese sulfate was added and diluted to 250 ml. During the performance, the three solutions A, B, and C were poured together in a large beaker and agitated with a glass rod to give a blue-amber alternate coloration for a few minutes.