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Baton Rouge community college
Experiment title:
Determination of density of solids
Course/Section #:
Chemistry 1121
Semester:
Spring 202 4
ABSTRACT:
In this experiment, we will be finding density of different objects. First, we will be finding mass by using spring balance and then volume by submerging objects in water and noting the difference in volume level. Then by using the formula of density (Density = Mass/ volume) we will calculate the density. Experiment was carried out by following method: https://www.youtube.com/watch?v=CzcdByf9ZC Chemicals: Name Chemical Formula Hazard Stone N/A N/A Iron Fe N/A Wood N/A N/A Steel Ball N/A N/A Copper “Lock" Cu N/A
Calculations:
- Density = mass (g) / volume (mL)
- The change in volume formula (ΔV) ΔV = Final volume (mL) – initial volume (mL)
Procedure:
- Tied the stone with twine and tied the other end with spring balance.
- Held it vertical and noted the weight of stone.
- Repeated the same procedure for iron, piece of wood, steel ball and copper lock. Observed their mass.
- Filled a 100 mL beaker with 50 mL water.
- Tied stone with twine and submerged it in water while holding the other end of twine.
- Noted the difference in water level and calculated the volume of stone.
- Repeated the procedure with each object.
- Calculated the density of all objects by dividing their masses with volume. Apparatus:
= 23.5 ml Volume of Wood = 71.4 mL – 50 mL = 21.4 ml Volume of Steel ball = 65.5 mL – 50 mL = 15.5 ml Volume of Copper lock = 70 mL – 50 mL = 20 ml
c. Density
Name Mass (g) Volume (mL) Density (g/ml) Stone 75 28.8 2. Iron 200 23.5 8. Wood 15 21.4 0. Steel Ball 120 15.5 7. Copper “Lock" 90 20 4.
Work on Density calculations:
Density = mass (g) / volume (mL) Density of Stone = 75 g / 28.8 mL = 2.6 g/mL Density of Iron = 200 g / 23.5 mL = 8.5 g/mL Density of Wood = 15 g / 21.4 mL = 0.7 g/mL Density of Steel ball = 120 g / 15.5 mL = 7.7 g/mL Density of Copper lock = 90 g / 20 mL = 4.5 g/mL
CONCLUSION:
Name Density from Experiment (g/mL) Density from Literature (g/cm^3 ) Stone 2.6 2. 6 - 2. Iron 8.5 7. Wood 0.7 0. 3 - 0. Steel Ball 7.7 7. 8 Copper “Lock" 4.5 8. 9
CONCLUSION:
The density stated in the literature is approximately the same as the density of objects tested in the lab. However, the calculated density and the real density of copper in the case of copper locks are very different. It indicates that a copper lock must include additional materials in addition to copper since it is not composed entirely of copper. In this experiment we learned how to estimate volume using the water displacement method and weight using a spring balance. And learned to determine density using mass and volume.
