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Periodic Properties. Unit 5. Pre-Lab Write-Up. The following are due before you can do the lab: Title Purpose (be specific) Materials (optional) Procedure (be specific) Data Table(s). Post-Lab Write-Up. The following will be completed once you have completed the lab:

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pre lab write up
Pre-Lab Write-Up
  • The following are due before you can do the lab:
    • Title
    • Purpose (be specific)
    • Materials (optional)
    • Procedure (be specific)
    • Data Table(s)
post lab write up
Post-Lab Write-Up
  • The following will be completed once you have completed the lab:
    • Data Analysis/Calculations
    • Graph
    • Conclusion
data analysis calculations
Data Analysis/Calculations
  • Show calculation for the density of each element, include proper unit, and watch for sig. figs.
    • Density = mass (g) / ∆volume (mL)
  • Calculate the percent error of the density of Ge and C. (this will be done after making the graph).

Exp - Act

Act

% Error =

x 100

Act. Density of C = 1.4 g/mL

Act. Density of Ge = 5.3 g/mL

graph
Graph
  • Construct a graph of density vs. atomic number (plot density on the y-axis and atomic number on the x-axis; both axes MUST start at zero.)
  • Draw a best fit line through your data
  • Use the graph to interpolate the density of Ge and extrapolate the density of C
  • Include appropriate markings on the graph for the unknown densities
  • Follow all graphing techniques discussed in class
conclusion
Conclusion
  • In your conclusion you should examine the results of your lab.
  • What values did you determine for the densities of Ge and C to be?
  • How were you able to determine the densities of these two elements? (EXPLAIN)
  • Were the results close to what they were supposed to be (examine your percent error)?
  • Why did you have error in your lab; what could you/would you do differently next time?
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