Volumetric Flask

What a Volumetric Flask Is and How to Use One

Volumetric flask
By Hannes Grobe 19:11, 3 September 2006 (UTC) (Own work) [ CC BY-SA 2.5], via Wikimedia Commons

A volumetric flask is a piece of laboratory glassware that is used to prepare a chemical solution. It is used to make up a solution to a known volume. Volumetric flasks measure volumes much more precisely than beakers or Erlenmeyer flasks

How to Recognize a Volumetric Flask

A volumetric flask is characterized by having a bulb and a long neck. Most volumetric flasks have a flattened bottom so that they can be set onto the lab bench, though some volumetric flasks have rounded bottoms.

How to Use a Volumetric Flask

  1. Measure and add the solute for the solution.
  2. Add enough solvent to dissolve the solute.
  3. Continue to add solvent until you near the line marked on the volumetric flask.
  4. Use a pipette or dropper to fill the volumetric flask, using the meniscus of the solution and the line on the flask to determine your endpoint.
  5. Seal the volumetric flask and invert it to thoroughly mix the solution.