Balance

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Description
The Draft Shield
The Digital Display
The Tare Button
Weighing Vessels
Keeping a Balance Clean
Weighing a Sample
Additional Topics
Using the Tare Function
Weighing Wet Samples
Weighing Volatile Liquids
Weighing Hot Objects
Simple Experiment
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Weighing Volatile Liquids

 

Video. Weighing volatile liquids.

If the displayed mass gradually drops while a liquid is being weighed, that liquid is probably volatile. The mass falls because the liquid is evaporating, causing the amount of substance in the weighing vessel to decrease. Take special precautions, such as a placing a rubber stopper in an Erlenmeyer flask, to seal the weighing vessel when weighing a liquid that evaporates quickly. Make sure to account for the mass of whatever you use to seal the weighing vessel.