Rank the following items in order of accuracy: volumetric pipet, beaker,buret,erlenmeyer flask,volumetric flask
http://academics.wellesley.edu/Chemistry/Chem105manual/Appendices/uncertainty_volumetric.html
To rank the accuracy of the following items, we need to consider their intended use for measuring liquids with varying levels of precision.
1. Volumetric Pipet: Volumetric pipets are designed to deliver an accurate and precise volume of liquid. These pipets have a high level of accuracy since they are typically calibrated to deliver a specific volume. They are commonly utilized in analytical chemistry and are considered one of the most accurate measuring devices.
2. Buret: Burets are used in titration experiments to deliver precise volumes of liquid. They are designed with graduations that allow for accurate measurement of the volume of liquid dispensed. Burets are generally more accurate than other common laboratory glassware, provided they are used correctly.
3. Volumetric Flask: Volumetric flasks are specifically calibrated to measure a precise volume of liquid at a particular temperature. They have a narrow neck designed to allow for accurate measurements when filled to the calibration line. Volumetric flasks offer a high level of accuracy.
4. Erlenmeyer Flask: Erlenmeyer flasks are widely used in laboratories for general purposes such as mixing, storing, or heating liquids. While they have graduations, these are typically not as precise as those found on volumetric pipets, burets, or volumetric flasks. Consequently, erlenmeyer flasks are less accurate than the aforementioned devices when it comes to measuring volumes.
5. Beaker: Beakers have numerous uses in the laboratory, including mixing, heating, or holding liquids. However, they are not designed for precise volume measurement. Although they often have approximate graduations, these markings are typically not as accurate as those on volumetric pipets, burets, volumetric flasks, or even erlenmeyer flasks. Therefore, beakers are the least accurate option for measuring volumes among the items listed.
Overall, the ranking from highest to lowest accuracy would be:
1. Volumetric Pipet
2. Buret
3. Volumetric Flask
4. Erlenmeyer Flask
5. Beaker