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以实验为基础是化学学科的重要特征之一。浓盐酸是普通中学实验室常用的酸,由于浓盐酸本身性质具有挥发性,加之随着外界温度变化、使用频次、放置过久、保管方法等因素的影响有可能导致浓盐酸的浓度呈现不确定性,为开展定量的化学实验带来诸多不便。如何在定量实验中学会误差分析,是实验教学中值得关注的一个问题。
Based on the experiment is one of the important characteristics of chemistry. Concentrated hydrochloric acid is a commonly used acid in ordinary middle school laboratories. Due to the volatile nature of concentrated hydrochloric acid itself, the concentration of concentrated hydrochloric acid may become uncertain as the outside temperature changes, the frequency of use, the place for a long time, and the custody method may influence the concentration of concentrated hydrochloric acid Sex, to carry out quantitative chemical experiments have brought a lot of inconvenience. How to learn error analysis in quantitative experiments is a problem worth noting in experimental teaching.