Density lab | inorganic chemistry

  
Density Lab
Name _______________________ Date __________ 
Part One: Density by Measurement (24 points): 
(one point per blank, calculations are 2 points each)
Cylinder #1 
Mass: _________________
Diameter: _________________
Radius (diameter/2): _________________
Height: _________________
Calculated volume of cylinder (show your work) 
Calculated density of cylinder (show your work):
Cylinder #2 _________________
Mass: _________________
Diameter: _________________
Radius (diameter/2): _________________
Height: _________________
Calculated volume of cylinder (show your work): 
Calculated density of cylinder (show your work):
Cylinder #3 
Mass: _________________
Diameter: _________________
Radius (diameter/2): _________________
Height: _________________
Calculated volume of cylinder (show your work): 
Calculated density of cylinder (show your work):
Part Two: Density By Displacement (24 points):
(one point per blank, calculations are 2 points each)
Cylinder #1 
Mass from part one: ________
Initial volume: _________________
Final volume (with cylinder in graduated cylinder): _________________
Volume displaced by cylinder: _________________ (show work below)
Calculate the density of the cylinder by displacement. (show your work): 
Cylinder #2 
Mass from part one: ________
Initial volume: _________________
Final volume (with cylinder in graduated cylinder): _________________
Volume displaced by cylinder: _________________ (show work below)
Calculate the density of the cylinder by displacement. (show your work): 
Cylinder #3 
Mass from part one: ________
Initial volume: _________________
Final volume (with cylinder in graduated cylinder): _________________
Volume displaced by cylinder: _________________ (show work below)
Calculate the density of the cylinder by displacement.  (show your work): 
Calculate the percent error for all three cylinders (5 points). 
Use your calculated density by displacement as the experimental value. Use the density given in the chart below as the accepted value. Show your work. Percent error formula was given above.
   
Substance
Density (g/cm3)
 
Aluminum
2.7
 
Acrylic
1.2
 
Polyethylene
0.9
What sources of error could cause the differences (2 points)?

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