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1 原实验的存在问题 1.为避免锥形瓶破裂,要在集气瓶底部铺 一层干燥的细砂。但在微热时,白磷先熔化, 渗入细砂,燃烧时只见白烟,不见发光。 2.微热时,白磷熔化,仍可能修过细砂,与 锥形瓶底部直接接触,导致锥形瓶破裂。 3.微热使白磷燃烧需要的时间较长 4.燃烧后,要等锥形瓶冷却后才能称量, 耗时又较多。
1 Problems with the original experiment 1. In order to avoid the rupture of the conical flask, a layer of dry fine sand was placed on the bottom of the cylinder. However, when it is slightly hot, white phosphorus first melts, penetrates into the fine sand, and when it burns, it only sees white smoke and no light is emitted. 2. When the heat is slightly hot, the white phosphorus is melted, fine sand may still be repaired, and it is in direct contact with the bottom of the Erlenmeyer flask, causing the Erlenmeyer flask to crack. 3. It takes a long time for the micro-heat to burn white phosphorus. 4. After burning, it is necessary to wait for the Erlenmeyer flask to cool before weighing, which takes more time.