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一、方案一:物理方法【原理一】利用气体压强差实验试剂:大理石、稀盐酸、浓氢氧化钠溶液、蒸馏水。实验用品:实验室制取二氧化碳的装置、相同的软饮料瓶两只、火柴。实验说明:实验所用的两只软饮料瓶的体积大小相等,两只瓶中的二氧化碳均要收集满,氢氧化钠溶液的浓度要达到20 mol/L,所加蒸馏水的质量与氢氧化钠溶液质量相等,确保两个实验具有可比性,对比实验装置如图1所示。
First, the first program: the physical method [Principle] The use of gas pressure difference test reagents: marble, dilute hydrochloric acid, concentrated sodium hydroxide solution, distilled water. Experimental supplies: laboratory equipment for the production of carbon dioxide, the same two soft drinks bottles, matches. The experiment shows that the volume of two soft drink bottles used in the experiment is equal and the carbon dioxide in both bottles should be collected completely. The concentration of sodium hydroxide solution should reach 20 mol / L. The quality of the added distilled water and the mass of sodium hydroxide solution Equal to ensure comparability of two experiments, comparative experimental device shown in Figure 1.