Beaker A glass container with a pouring lip ... tapering glass or plastic tube used to eject or suck in a small amount of fluid. Test tube A thin, cylindrical container, usually made of glass.

This reaction can be used as a test for phenol groups. Mix several drops or a few crystals of compound to be tested in a beaker or in a 200mm test tube. Add a few drops of 1% FeCl3. As a control, add ...

in the beaker across the membrane, decreasing the volume of liquid in the Visking tubing, which lowers the level of liquid in the capillary tube. Water moves equally from inside the tubing to ...