How To Use Volumetric Flasks

Volumetric flasks are mainly used for the preparation of highly accurate standard solutions. They are calibrated according to « to contain ». First put the exact and precise weight of the substance into the flask. Then fill the volumetric flask with water (distilled water) about half of the volume and mix the content fully. Then fill in with more liquid just a bit below of the calibration ring mark. Then add some more water so that the meniscus will be exactly at the same level of the ring mark. Pay attention to read the meniscus at the eye level and pay attention not to wet the neck wall above the ring mark level.