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取两只同样大小的集气瓶和两片毛玻璃,将其中一只集气瓶内壁用水润湿。用向上排空法将两瓶分别收集满H_2S气体和SO_2气体,盖好玻璃片,待用。
Take two same size gas collection cylinders and two pieces of frosted glass, and moisten the inner wall of one of the collection cylinders with water. Two bottles of H_2S gas and SO_2 gas were collected separately by the method of upward emptying, and the glass pieces were covered and put to use.