【摘要】 在化学定性分析和定量分析中,对溶液盛装的玻璃器皿进行洗涤,要求用纯水冲洗以免残留杂质影响分析结果。一般教材要求少量多次冲洗,至于为什么要用少量多次冲洗,而不用大量一次清洗的道理并没有详细的陈述。本文对此原理进行探讨,研究结果表明"少量多次"是溶剂体积乘积造成的。根据这一原理可以设计节水型洗衣机,打造节水型经济,节约大量生活用水,对保护环境,特别是水环境有重大的意义。更多还原

【Abstract】 During chemical qualitative analysis and quantitative analysis, we need to wash the glassware with pure water in order to reduce residual impurities which could affect the analysis results. Usually, we need to wash glassware with small amount of water in many times. However, why should we do this rather than large amount with one time? This paper discusses this issue by analyzing washing method with several assumptions in different conditions. This paper confirms the washing method is reasonable.更多还原