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1．《氯化氢气体的制法和性质》实验的微型装置如图1所示。图1中A和B为两支自己加工制作的V型管，底部稍吹膨胀，二者用胶管相连。在A管底部装入约0．2g食盐，右上部放入少许棉花。B管底部放入约0．5mL2％氢氧化钠溶液，并滴加1满酚酞指示剂。B管左上部放一条润湿的蓝色石蕊试
1. The microdevice for the experiment of “Preparation and properties of hydrogen chloride gas” is shown in FIG. 1 . In Figure 1, A and B are two V-shaped tubes processed by oneself. The bottom is slightly blown and expanded, and the two are connected by rubber tubes. About 0.2 g of salt is placed at the bottom of the A tube, and a little cotton is placed in the upper right. Place approximately 0.5 mL of 2% sodium hydroxide solution at the bottom of the B tube and add 1 full phenolphthalein indicator. Place a wet blue litmus test in the upper left of tube B