Density lab by a74QIjce

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									                                             Name ___________________
                                             Period ______

                                      Density Lab

Purpose: To determine the density of a variety of substances.

Supplies: graduated cylinder    balance      glass rods        copper strips
          Wooden blocks         calculator   ruler

Procedure:
1. Examine the graduated cylinder. How much change in volume does each line or
“dash” on the graduated cylinder scale represent? __________ mL



2. Using the graduated cylinder, find the volume of the 5 copper strips by using a
technique called water displacement. In order to do this, put water into the
graduated cylinder and record the amount of water. Carefully slide all the strips into
the graduated cylinder and record the water level. The volume of the strips is the
difference between those two volumes.

                    Volume of water      Volume of water +     Volume of strips
                                         strips

Trial 1

Trial 2
Trial 3


                                         Average volume:

3. Dry the copper strips and find the mass of all the strips      ________ g



4. Determine the density of copper. Show your work. Remember the formula for
density!!



                                 Calculated copper density: _______ g/mL
5. The actual density of copper is 8.92 g/mL. How does that number compare with
your calculated result? How far “off” were you?




6. What are some reasons that your value may differ from the actual density?




7. Find the volume of the glass rods by the water displacement technique.

                     Volume of water     Volume of water +      Volume of glass
                                         glass

Trial 1

Trial 2
Trial 3


                                         Average volume:

8. Dry the glass rods and find their mass:                   ___________ g



9. Calculate the density of the glass. Show your work.

                                                            _________ g/mL

10. Obtain a small wooden block. List the letter code on that block: ______
Measure the block with a ruler:

          Length = ______cm   Width = ______ cm     Height = ________cm

11. Calculate the volume of the wooden block. (V = l x w x h)



12. Find the mass of the wooden block.                          __________ g



13. Calculate the density of the wooden block. Show your work! ____ g/mL

								
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