December 04, 2020, 03:04:19 PM
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Topic: Question about glassware measurements.  (Read 155 times)

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Offline Dhisbdj

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Question about glassware measurements.
« on: October 29, 2020, 04:56:50 PM »
Why do different glassware give different measurements when measuring the same amount ? I measured 15 ml on volumetric flask but got less using graduated cylinder.

Offline Borek

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Re: Question about glassware measurements.
« Reply #1 on: October 29, 2020, 08:23:40 PM »
A lot depends on the glass accuracy and technique used. Not knowing what and how you did, it is impossible to comment.
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Offline jeffmoonchop

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Re: Question about glassware measurements.
« Reply #2 on: October 30, 2020, 12:46:53 PM »
Cylinders shouldn't be used if accuracy is needed. Volumetrics are more accurate. But you can buy different grades of glassware, Ideally the volumetric should be A rated. And make sure your meniscus is sitting on the line.

Offline jeffmoonchop

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Re: Question about glassware measurements.
« Reply #3 on: October 30, 2020, 12:47:48 PM »
Also if you pour the liquid from the volumetric into the cylinder, you'll leave some behind and get less in the cylinder.

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