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MEASUREMENT OF LIQUID VOLUME (APPARATUS ( Burette, 50 mL (used to…
MEASUREMENT OF LIQUID VOLUME
OBJECTIVES
TO BECOME FAMILIAR WITH COMMON LAB APPARATUS
TO MEASURE VOLUME USING THE VARIOUS LAB APPARATUS
TO CALCULATE THE WATER DENSITY FOR EACH APPARATUS
Water density = mass of distilled water (g) / volume of distilled water (mL)
TO CALCULATE THE PERCENTAGE ERROR FOR EACH APPARATUS
APPARATUS
2 Beakers, 100mL
Burette, 50 mL
used to transfer liquid volume in most titrations
Filter funnel
Pipette, 25 mL
used to transfer liquid volume
Volumetric flask, 50 mL
used to contain liquid volume during the preparation and dilution of solutions
Graduated cylinder, 50 mL
used to estimate liquid volume
Dropper
Thermometer
Wash bottle
Electronic balance
CHEMICAL
Distilled water
PROCEDURE
Transfer 50.00 mL distilled water carefully from the burette into the pre-weighed beaker A.
Reweigh beaker A. Record the mass and the water temperature.
Fill a burette with distilled water using a filter funnel to 0.00 mL mark.
Repeat steps 1 to 4 using the following apparatus to transfer 50 mL of distilled water.
a. Pipette
b. Volumetric flask
c. Graduated or measuring cylinder
d. Beaker
Weigh a dry 100 mL beaker (mark as beaker A).
REMINDER
Pipette and volumetric flask must be filled to the graduation mark
Make sure the burette tip is filled with water
Make sure to weigh the dry empty beaker for each apparatus used.
Use the same balance to weigh the empty beaker and beaker filled with distilled water.