12 Questions
What is the purpose of a volumetric flask?
To measure a specified volume with an error range of 0.03-0.2%
How do volumetric flasks differ in the precision of volume measurement based on their size?
Smaller flasks measure volumes to the tenth of a milliliter while larger flasks measure to the hundredth
How is the final adjustment of volume made in a volumetric flask?
Using a dropping pipet after adding solvent in portions
What is the primary function of a transfer pipet?
To deliver a specified volume of solution accurately
How does the volume error of transfer pipets compare to that of equivalent volumetric flasks?
Transfer pipets and volumetric flasks have similar volume errors
What is the correct method to adjust the liquid's level in a pipet to the calibration mark?
Ensure the meniscus is even with the glassware's calibration mark
Why is it important for a volumetric flask to be inverted at least ten times during the mixing process?
To ensure complete dissolution of the reagent
Why should a transfer pipet never be filled using mouth suction?
The liquid's level will not be accurate
What happens if there are drops of liquid above the calibration mark in a volumetric flask?
The delivered volume is greater than the calibrated volume
Why should you rinse a pipet or volumetric flask with the solution being measured before use?
To ensure accurate measurement of the solution
What is the purpose of setting the liquid's level at the calibration mark of a pipet or volumetric flask?
To deliver the calibrated volume accurately
How can dirt and grease affect the accuracy of liquid measurements in glassware?
They prevent liquids from draining evenly
Learn about volumetric flasks, which are designed to contain a specific volume of solution at a given temperature with high precision. Understand how the volume indicated by a volumetric flask is accurate to within 0.03-0.2% of the stated value, and how the level of precision varies based on the flask's size.
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