Buret vs pipet

[akimhaneul]

There is a destroyer question in orgo section that involves delivering 15.6 ml of liquid in an experiment. The choices are graduated cylinder, buret, pipet, volumetric flask, and condenser.


Why can't you use graduated cylinder or buret?


The answer is pipet

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[Flemish]

Pipettes are typically used for smaller volumes. Like less than a mL. I could be wrong but this is probably just a bad question/answer. I also don't know exactly what it means by "delivering"--is it already measured? Like I said, probably just a bad q.


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[Flemish]

If it were a titration, buret.


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[Flemish]

Graduated cylinder would maybe work though there are larger, electronic pipettes that could be used for that volume...not sure that those are included in the test material though.


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[iphone2020]

Graduate cylinder is good For measure of irregular shape object


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[akimhaneul]

@orgoman22

Could you please help?


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[8_man]

Let's review the incorrect choices:
Because of the large diameter of a graduated cylinder, there is a significant chance for parallax error. Hence, it is not a good tool for accurate measurements.

A buret can accurately measure the volume of a liquid, but it is a lab tool used specifically for titrations. Thus, it is not the most appropriate tool to measure precise volumes with. A pipette would be the best answer.

 

[8_man]

In case you are not satisfied with my answer, here is a quote from the man himself.

Typically, a burette and pipette are used for different purposes in laboratory procedures. The burette delivers accurate volumes of liquid to another container, such as in a titration. When an analyst titrates two substances, he or she analyzes how much of one substance is needed to make a visually recognizable change in the other substance. Changes in appearance with regard to volume of liquid can be used to calculate concentrations of certain components in the sample substance. Pipettes can also be used in titrations, but as they contain less liquid, and may require refills, the burette is more time efficient. Conversely, because burettes are unwieldy to use, pipettes are the preferred mode of measuring out liquids and delivering the liquids to other containers.

Dr. Romano

 

[DAT Destroyer]

In case you are not satisfied with my answer, here is a quote from the man himself.

Thank you!