1, the position of burette in acid-base titration (which is an acid burette and which is an alkaline burette);

2, before use, first pay attention to the burette leak detection, to ensure that both burettes don't leak;

3. Before titration, moisten and rinse the burette with the solution to be tested to avoid the solution concentration decreasing;

4. The lower end of the acid burette is a glass plug; The lower end of the basic burette is a rubber tube with glass beads. Before titration, pay attention to squeeze out the air at the lower end of the burette to avoid inaccurate titration results caused by bubbles;

5. After titration, pay attention to the head-up titration reading to avoid reading errors caused by head-up or head-down.