搜索 - 科创网

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内容：3．滴定管滴定管是容量分析中专用于滴定操作的较精密的玻璃仪器，它属量出式。,滴定管的种类较多。,中学用于酸碱中和滴定时常使用无阀滴定管和有阀滴定管2种。,有阀滴定管的下部带有磨砂活动玻璃阀（常称活塞），因宜用于盛装酸性溶液，所以又称它为酸式滴定管。,使用注意事项（1）酸式滴定管可盛除碱性以及对玻璃有腐蚀作用以外的液体，碱式滴定管只盛碱液。

内容：类似的实验我做过，并且根据我的样品滴定得到的K2CO3理论含量，产率是221%（以无水碳酸钾计），我认为它可能是磷酸钾和水合碳酸钾的混合物。

内容：严禁所有的有机溶剂在烧瓶内直火加热,这是最危险的,如果有溶剂外露或者瓶底破裂,旁边的操作人员非常危险.15.氯仿,四氯化碳,甲醇以及苯等高危溶剂,或者盐酸等强刺激性气体使用时候注意排气通风.16.酸式滴定管禁止使用碱性物质,,否则将腐蚀磨沙玻璃部分以及管壁造成不能密闭漏水以及体积不准确;碱式滴定管严禁使用强氧化试剂比如高锰酸钾重铬酸钾.如果是中性物质,尽量用碱式滴定管(碱式滴定管容易操作).17.硫酸,硝酸等氧化性酸,注意使用安全,禁止倒入下水道,造成环境污染.所有的高浓度无机废液,包括酸碱以及所有的有毒废液,比如砷试剂都严禁倒入下水道.21.实验的所有操作,都要先学习老师的标准,然后进行自己操作,常常看到有学生连滴管都不知道如何拿,滴定管,(尤其是碱式滴定管)如何进行滴加.22.乙醚做实验的时候,要注意排风和防火实验的所有操作,其实都是日积月累的过程,不要认为实验是不重要的,恰恰相反,实验有些时候比理论更加的重要.虽然中学阶段实验可能并不是能帮助你考入大学,,可是实验在化学的知识体系中是不可忽视的.一个很简单的操作比如酸碱滴定的终点滴定,1/2滴及1/4滴的掌握,往往能够看出一个人化学的基本素质.如果是投身于化学事业,则基本的化学操作也是项项需要考核,包括配置标准浓度溶液这些我们中学就学过的操作

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