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Home Q & A Board Biology-Related Homework Help Biochemistry
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gh1991 gh1991
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13 years ago
When preparing aqeous solutions in a volumetric flask, does it matter if there are a few droplets of water in the bottom of the flask or does the flask need to be completely dry? explain.

thank you in advance Smiling Face with Open Mouth
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#1
Staff Member
13 years ago
Has to be completely dry because it increases the actual volume you're measuring and thereby adding a potential source of error; also most volumetric flasks are calibrated precisely to the volume ascribed, and the actual extra liquid it contains could also be a chemical that reacts with the solution you are testing.
- Master of Science in Biology
- Bachelor of Science
gh1991 Author
wrote...
#2
13 years ago
but i read somewhere that it doesnt matter if it completly dry or not as long as your measurements are correct, is that right or does it still need to be completly dry?
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#3
Donated
Valued Member
13 years ago
It doesn't have to be completely dry. If you are going to dilute the contents with water, what difference does it make if there is already some water in the flask?
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