Don ' t let inaccuracy hold you back in lab ! this video introduces the proper methods for measuring precise volumes of liquid using pipets , burets , volumetric flasks , and syringes 不要让不精确在实验室阻碍你!此影片介绍正确方法来使用滴管、滴定管、量瓶和注射器精确测量液体体积。
Through the analysis of contest experimental test questions from 1995 to 2003 , it is found that metage , synthesis , standardization and determination are the characteristics of these years " experimental test questions . chemistry experiment is based on the elementary knowledge , especially checking the usage of suction pipet and buret . the core of questions lies on the basic operation of metage , dissolution , suction , refluxing , filter , wash and titration 通过对1996 - 2003年化学竞赛决赛实验题进行分析得出： “称量?合成?标定?测定”是近几年实验试题的特点；化学实验重在基础，特别是考察移液管和滴定管的使用；基本操作如称量、溶解、移液、回馏、抽滤、洗涤、滴定等是实验考查的重点。
