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To confirm that you are using the pipet properly, you can perform the following experiment.
Obtain some distilled water. Record the temperature of the water.
Weigh a beaker and record the mass of the beaker. Then, transfer some water to the beaker using the pipet. Make sure to record the volume of water that is transferred.
Determine the mass of the water that was transferred.
Look up the density of water at the temperature recorded above (a CRC Handbook of Chemistry and Physics will contain an appropriate table) and use the relationship between the density and the mass to determine the actual volume of water that was delivered. Compare the volume determined from the mass to the volume you recorded from the pipet. They should be the same, are they?
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