选用瓶颈略细的200毫升容量瓶一只,实验前用装水法测出满瓶的3/4体积位置,做好标记。实验时,将这容量瓶灌满饱和食盐水,并倒置于盛有饱和食盐水的水槽中,先以排水法收集3/4体积氯气,后通入甲烷至满瓶,仍让其倒置其中,用铁夹固定后,移至阳光下,在阳光的直接照射下,过不多久,可看到细瓶颈中的液面慢慢上升,约过4分种,液面能升达5厘米,混和气体的黄绿色逐渐变 Select a bottleneck slightly 200 ml volumetric flask, before the experiment with water method to measure the full bottle 3/4 volume position, make a mark. During the experiment, the volumetric flask was filled with saturated salt water and placed in a water bath filled with saturated salt water. First, 3/4 volume of chlorine gas was collected by drainage method and methane was introduced into the flask until it was inverted. With the iron clamp fixed, moved to the sun, the direct sunlight, too long, you can see the fine bottle neck slowly rising, about 4 minutes, the liquid can rise up to 5 cm, mixing Gas yellow-green gradually change