5 mL PIPETS
Pictured on the left are the two 5 mL pipets
in your locker.
On the left is a Graduated
on the right is a Volumetric
Both can measure out 5.00 mL of solution.
The Volumetric Pipet is
filled to the mark and allowed to empty to deliver 5.00 mL.
HOWEVER.... the Graduated Pipet must be filled to 0.0 mark and then emptied only to the 5.0 mark.
The very botton of this pipet is not calibrated so this liquid must remain in the pipet!
Also note the construction
of all accurate volumetric equipment. There is always a narrow part and this is where the
volume is actually measured. This part of the glassware is narrow so if you make a small
error in adjusting the meniscus to that mark, the actual volume error will still be small.
HOWEVER this should not be an invitation to