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一、关于钠的取用与保存对每个涉及关于钠的化学实验,从拿到保存钠的试剂瓶到钠的取用结束,均涉及了以下步骤,也从每一个具体操作中隐含或体现着钠的一些性质: (1)从保存试剂瓶看:钠保存于煤油中,说明钠不与煤油反应,从钠所在位置可得ρ(钠)> ρ(煤油);目的:隔绝空气,也隐含着钠极易被氧化,所以钠的保存应宜封忌敞,少量的钠可保存于煤油中. (2)使用镊子:说明钠对人体皮肤有很强的腐蚀性.
I. Regarding the taking and preservation of sodium For each chemical experiment involving sodium, from taking the reagent bottle holding the sodium to the end of taking sodium, both involve the following steps, also implied from each specific operation or Reflects some of the properties of sodium: (1) from the preservation of reagent bottles: sodium stored in kerosene, indicating that sodium does not react with kerosene, available from the location of sodium ρ (sodium)> ρ (kerosene); purpose: from the air, It also implies that sodium is easily oxidized, so the preservation of sodium should be sealed tightly, and a small amount of sodium can be stored in kerosene. (2) Use of wolfberry: Sodium has a strong corrosive effect on human skin.