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#Name:Partner(s):Date:Lab 2: Determining the Density of Unknown Metal
MATERIALS & DENSITIESMaterial Density Material DensityAluminum 2.70 g/cm3 Maple 0.77 g/cm3
Brass 8.60 g/cm3 Polystyrene 1.05 g/cm3
Copper 8.96 g/cm3 Polyamide (Nylon) 1.15 g/cm3
Acrylic 1.17 g/cm3 High Density Polyethylene 0.95 g/cm3
Phenolic 1.32 g/cm3 Acetal 1.42 g/cm3
Polypropylene 0.90 g/cm3 Chlorinated Polyvinyl chloride (PVC)
1.54 g/cm3
Polyethylene terephthalate (PETG)
1.28 g/cm3 PTFE (Teflon) 2.20 g/cm3
DATA
Description of Unknown
Mass (g)
Displacement Volume (mL) Linear Measurement Volume
Initial Final Volume (mL)
Diameter (mm)
Length (mm)
Volume (cm3)convert mm3
Density calculation (Displacement) Density calculation (Linear Measurement)
Determined Identity of Unknown :
Percent Error Determination based upon determined identity
Water Displacement Linear MeasurementCalculation % error Calculation % error
POST-LAB QUESTIONS
1. Which type of volume determination was more precise: water displacement or linear measurement? Explain your reasoning. How could the less precise method be made more precise?
2. Did the density that you calculated for each unknown match the densities given in the table exactly? If not, explain why your calculated density was different than the density given in the table.
3. Look up the definitions of intensive and extensive properties, respectively. Is density an intensive or an extensive property? Explain your reasoning.