Volumetric Techniques MIT Digital Lab Techniques Manual
[PIANO MUSIC PLAYING] [SOFT GLISSANDO PLAYING] PROFESSOR: Volumetric techniques-- measuring, essentially. Have you ever added too much pepper to a recipe? I know, it's not so great afterwards, but it's an innocent mistake. But in the lab, you have to be sure to have precise measurements. So we're going to learn how to get those now. We'll be using the volumetric pipette, the burette, the volumetric flask, and the syringe. Now for some basic rules. First and foremost, keep all glassware clean. You want to be able to clearly read the markings on all your equipment. Therefore, keep it clean. Also, you always need to read at the bottom of the meniscus. The meniscus is the curved interface between the air and the liquid. You need to read at eye level and at the bottom of the meniscus in order to get a correct reading. Now for the basics of washing your equipment. First, use soap solution to clean it. Then rinse with tap water. Then rinse with distilled water, r...