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Determine the errors of the volumetric devices. a. For each pipette determine the mean volume. You...

Determine the errors of the volumetric devices.

a. For each pipette determine the mean volume. You will need to use the CRC, Perry’s Handbook or other reference to obtain the density of water at the lab temperature>>(THE DENSITY OF THE WATER WAS P = 0.9975412 +/- 0.0000001 g/mL (23o C)

b. Use the propagation of error method to find the error in volume associated with each device.

c. Calculate the percent uncertainty for each device, and percent error.

For this lab a beaker was weighed "full" (whatever the size of the pipette 1mL, 10mL, 25mL, the beaker was filled with that much water) and empty each time for 5 different trials in order to determine the consistency/accuracy of the pipette.

10mL pipette

Empty (refers to the weight of the beaker without fluid):

Trial 1: 31.3828g

Trial 2: 31.3851g

Trial 3: 31. 3825g

Trial 4: 31.3829g

Trial 5: 31.3841g

10mL Pipette beaker "full" with 10mL

Full:

Trial 1: 41.3895g

Trial 2: 41.4379g

Trial 3: 41.3589g

Trial 4: 41.3471g

Trial 5: 41.3902g

I appreciate it!

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volume error: 0.25%

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