在化学实验中,经常用到一些定容仪器如量筒、滴定管、容量瓶等。这些定容仪器读数时视线应与仪器的凹液面的最低处保持水平(平视),然后读取与凹液面相切的刻度值,如果仰视(从低处看)、俯视(从高处看)观察凹液面时往往会引起所取液体体积或读数的误差,而仰俯视引起的此类误差同学们经常判断不清,容易混淆。下面将滴定管、量筒、容量瓶三种仪器在实验使用中可能会出现的误差情况作以分类归纳,仅供同学们学习时参考。 In chemical experiments, often use some constant volume equipment such as measuring cylinder, burette, volumetric flask and so on. These readings should be taken at the lowest level of the concave surface of the instrument (head-up) and then read the scale tangent to the concave surface. If looking upward (from a lower perspective), looking down See) Observation concave surface often lead to the liquid volume or reading error, and looking down caused such errors are often unclear, easy to confuse. The following burette, graduated cylinder, three kinds of volumetric flask in the experimental use of the error may be classified as induction, only for students to learn reference.