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Why are you instructed to put a stopper to the flask and vials during the weighing?

by Guest10994  |  earlier

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Why are you instructed to put a stopper to the flask and vials during the weighing?

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  1. so you don't go wafting weird smelling chemicals about the lab when traveling to and from the weighing scales.


  2. Maybe to prevent any water absorption by the reagents or evaporation of the reagents?
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