1·Estimate what you think the uncertainty is in weighing, using the buret, and in endpoint location. Do error propagation from these values and compare with the observed precision.
估计一下在秤量，使用滴定管和确定终定位置的不确定度。用这些值计算误差传播而且跟所观测值比较一下。
2·Mean. Estimate what you think the uncertainty is in weighing, using the buret, and in endpoint location.
估计一下在秤量，使用滴定管和确定终定位置的不确定度。
3·Chemistry experiment is based on the elementary knowledge, especially checking the usage of suction pipet and buret.
化学实验重在基础，特别是考察移液管和滴定管的使用；
4·Of solution to drop from the buret. Use parafilm to secure the tip of the buret.
细小液滴。要用石膜保护滴定管的塑胶头。
5·Use parafilm to secure the tip of the buret.
要用石腊膜保护滴定管的塑胶头。