1.实验器材烧杯1000ml一个、平底烧瓶250ml两个、小泡沫块、细直铁丝、小剪刀、药匙、碘粒、樟脑丸、直径比烧瓶口大的瓶盖两个、开水、抹布2.实验步骤、现象及结论(1)用小剪刀剪一个泡沫球,直径比烧瓶管口小.(2)取一根长度比平底烧瓶的高稍短的细直铁丝,一端弯成钩,另一端穿入泡沫球,见图1.(3)用药匙在一个平底烧瓶中加入 1. Laboratory equipment Beaker 1000ml, flat-bottomed flask 250ml two small foam block, thin wire, small scissors, medicine spoon, iodine tablets, mothballs, the bottle diameter larger than the flask two, water, rags 2. Experiment Steps, phenomena and conclusions (1) Use a small scissors to cut a foam ball diameter smaller than the flask nozzle (2) Take a length slightly shorter than the flat-bottomed flask straight thin wire, one end bent into a hook, the other end wear Into the foam ball, shown in Figure 1. (3) with a spoon added in a flat-bottomed flask