What should be noted when reading a burette

When reading a burette, the line of sight must be at the same level as the liquid surface. For colorless or light-colored solutions, read the scale at the lowest point of the lower edge of their meniscus ； For dark solutions such as potassium permanganate and iodine solution, it is possible to read the scales at the highest points on both sides. If there is a blue band at the back of the burette, a colorless solution will form two menisci that intersect at the midpoint of the blue line; the reading is then taken from the scale at this intersection point. For a dark-colored solution, the reading is still taken from the scales at the highest points on either side of the liquid surface. To make the reading clearer, a piece of paper can also be placed behind the burette as a background to create a deeper meniscus. Read the lower edge of the meniscus; this way, it is not affected by light and is easier to observe.

The simplest and most important thing is that the readings must be accurate and reliable. As for the method to be used, it also depends on the type of burette and whether the method you choose is appropriate. An automatic buret displays the reading without the need to observe it. For a manual burette, first of all your eyes need to be normal, and then you need to read the values using the correct method for reading the burette’s scale. As mentioned above, it’s just part of that.