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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