Lab question

[user122]

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How do you know when to use a pipet vs buret vs graduated cylinder vs volumetric flask? Is there any way to specify when to use each one based on the volume that needs to be measured?

 

[tomhrxbfg]

From my previous lab experiences I think for pipet the largest one is 1ml. It could go down to 1 microL. Buret maybe up to 20 ml, not too sure. Graduated cylinder /flask no idea since I'm not a chem person lol. Hope it helps.

 

[ikecarus]

Pipets: usually used for small, precise volumes
Burets: usually used for titrations/column chromatography
Graduated cylinders: 10mL is a "standard" in many labs, others will also have 25mL - graduated cylinders have markings so that when you read the meniscus of your solution (ex. water), you can estimate to two decimal points.
Volumetric flasks: usually used to measure a very precise volume - there's usually only one mark etched on the neck of the flask

IDK, hope that helps.

 

[voager]

Also be prepared to get question where buret is given with solution miniscus and you are asked to read it for example i was give a picture of buret filled between 5 - 6 ml and asked if it's 5.8 , 5.7, 6.1, 6.2 etc....

if you just don't know ...always read buret from top to bottom.....as the buret numbering starts from top starting with 0ml