Podcast
Questions and Answers
What is the purpose of a volumetric flask?
What is the purpose of a volumetric flask?
- To store solutions at varying temperatures
- To measure volumes with an error range of 1-5%
- To mix solutions in a laboratory setting
- To measure a specified volume with an error range of 0.03-0.2% (correct)
How do volumetric flasks differ in the precision of volume measurement based on their size?
How do volumetric flasks differ in the precision of volume measurement based on their size?
- All flasks measure volumes to the tenth of a milliliter
- Larger flasks measure volumes to the hundredth of a milliliter while smaller flasks measure to the tenth
- All flasks measure volumes to the hundredth of a milliliter
- Smaller flasks measure volumes to the tenth of a milliliter while larger flasks measure to the hundredth (correct)
How is the final adjustment of volume made in a volumetric flask?
How is the final adjustment of volume made in a volumetric flask?
- By weighing the solution before adding more solvent
- By pouring until it visually reaches the calibration mark
- Using a measuring cylinder
- Using a dropping pipet after adding solvent in portions (correct)
What is the primary function of a transfer pipet?
What is the primary function of a transfer pipet?
How does the volume error of transfer pipets compare to that of equivalent volumetric flasks?
How does the volume error of transfer pipets compare to that of equivalent volumetric flasks?
What is the correct method to adjust the liquid's level in a pipet to the calibration mark?
What is the correct method to adjust the liquid's level in a pipet to the calibration mark?
Why is it important for a volumetric flask to be inverted at least ten times during the mixing process?
Why is it important for a volumetric flask to be inverted at least ten times during the mixing process?
Why should a transfer pipet never be filled using mouth suction?
Why should a transfer pipet never be filled using mouth suction?
What happens if there are drops of liquid above the calibration mark in a volumetric flask?
What happens if there are drops of liquid above the calibration mark in a volumetric flask?
Why should you rinse a pipet or volumetric flask with the solution being measured before use?
Why should you rinse a pipet or volumetric flask with the solution being measured before use?
What is the purpose of setting the liquid's level at the calibration mark of a pipet or volumetric flask?
What is the purpose of setting the liquid's level at the calibration mark of a pipet or volumetric flask?
How can dirt and grease affect the accuracy of liquid measurements in glassware?
How can dirt and grease affect the accuracy of liquid measurements in glassware?
