rank the following items in order of accuracy when they are used for their intended purpose: volumetric pipet, beaker,erlenmeyer flask,mohr pipet,graduated cylinder,volumetric flask,buret
my answer
MOHR PIPETTE 1
VOLUMETRIC PIPETTE 2
BURET 3
VOLUMETRIC FLASK 4
GRAD CYLINDER 5
BEAKER 6
ERLENMEYER FLASK 7
I have spent a lot of time looking for a site to which I could refer you to for this question but to no avail. So here is my best educated guess and the reasoning.
I think volumetric pipets are #1 in accuracy. They require only one measurement reading (when the pipet is full).
buret I rank as 2. Basically I think the mohr pipet and buret are about the same but the stopcock on the buret is easier to control than the finger on the mohr pipet so I rank the buret higher.
volumetric flask as 4 as you have it
graduated cylinder as 5 as you have it.
I would put the Erlenmeyer flask as 6 and over the beaker because of the shape of the Erlenmeyer flask. Since the sides slope markings at the top of the flask are easier to read than they are on the beaker so I think the Erlenmeyer flask can be read more accurately.
To rank the items in order of accuracy when used for their intended purpose, we need to consider their precision and ability to deliver precise and accurate measurements. Here is a suggested ranking:
1. Volumetric Pipet: This is typically the most accurate tool for delivering precise volumes, as it is designed to measure and transfer a specific volume accurately.
2. Mohr Pipet: This type of pipet is also designed for accurate volume measurements but may have slightly less precision compared to a volumetric pipet.
3. Buret: Burets are known for their high accuracy in measuring volumes. They are commonly used in titrations and can deliver precise volumes with good precision.
4. Volumetric Flask: Volumetric flasks are designed to measure and hold very precise volumes of liquids. While they are highly accurate, their precision may be slightly lower than that of a pipet or a buret.
5. Graduated Cylinder: Graduated cylinders are commonly used tools for measuring volumes and are relatively accurate. However, they may have slightly lower precision compared to more specialized glassware like pipets or burets.
6. Beaker: Beakers are multipurpose containers and are not typically designed for accurate measurements. They provide approximate volume measurements but may not be as precise as more specialized glassware.
7. Erlenmeyer Flask: Erlenmeyer flasks are also multipurpose containers commonly used in laboratories. Like beakers, they are not designed for precise measurements and should be used for less critical volume determinations.
Please note that this ranking is based on general guidelines and the intended purpose of each item. Different manufacturers and specific contexts may slightly alter the accuracy and precision of these tools.