The graduated cylinder reads twenty five milliliters because it has a calibration error that makes every volume measurement come out a bit low compared to the more accurate buret.
Think of the graduated cylinder like a ruler that was printed a little short; when you measure with it, everything looks smaller than it really is. A buret is built to be more precise and is usually checked against standards, so it will show the true volume while the faulty cylinder stays stuck at twenty five milliliters. The problem is systematic, which means the error is consistent and not just random luck, so every time you pour the same amount the cylinder repeats the same wrong number. You can catch this by comparing the cylinder to a trusted glassware piece before using it, or by having the cylinder recalibrated or replaced if it always reads off.
Students often assume their eye placement is the only cause, but if you read at the correct meniscus height and still get the wrong value, the cylinder itself may be wrong, and you should not just keep using it. Another common mistake is ignoring temperature effects; liquids expand slightly with heat, but that alone will not consistently make a cylinder read low by more than a milliliter if the buret is accurate. If you suspect calibration error, mark the difference and avoid relying on that cylinder for precise work or send it for calibration.
Check out w w w dot gumball degree dot com for more videos and resources on spotting and handling calibration errors in lab glassware.
Graduated Cylinder Reads Low Compared to Buret
- Compare cylinder to trusted glassware
- Check for consistent reading errors
- Recalibrate or replace the cylinder
Common Calibration and Reading Errors
- Misreading meniscus position
- Ignoring temperature effects
- Using uncalibrated glassware
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