A volumetric flask is a piece of laboratory glassware that is used to prepare and measure chemical solutions.
It is used to make up a solution to a known volume. Volumetric flasks measure volumes much more precisely than beakers and Erlenmeyer flasks.
A volumetric flask is characterized by a bulb and a long neck.
Most volumetric flaskshave flattened bottoms so that they can be placed on a lab bench or other surface, though some volumetric flasks have rounded bottoms and must be handled with special protective equipment.
To prepare a solution in a volumetric flask, follow these steps:
- 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.