We have heard from many people about how useful the list of common chemistry lab equipments with pictures have been. In an effort to provide more information about common equipments used in chemistry abs, we have put together a list of common glasswares used in a chemistry labs with pictures and descriptions in this post. Please, let us know if we are missing anything or of you have any questions.
A volumetric flask is used to make up a solution of fixed volume very accurately. This volumetric flask measures 500 mL ± 0.2 mL. This is a relative uncertainty of 4 x 10-4 or 400 parts per million.
To make up a solution, first dissolve the solid material completely, in less water than required to fill the flask to the mark.
After the solid is completely dissolved, very carefully fill the flask to the 500 mL mark. Move your eye to the level of the mark on the neck of the flask and line it up so that the circle around the neck looks like a line, not an ellipse. Then add distilled water a drop at a time until the bottom of the meniscus lines up exactly with the mark on the neck of the flask. Take care that no drops of liquid are in the neck of the flask above the mark.
After the final dilution, remember to mix your solution thoroughly, by inverting the flask and shaking.