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360Science™: Percent Copper in Brass

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In this investigation, students will determine the amount of copper in a sample of brass using UV-Visible spectrophotometry. In this short-on-time version, students will use a calibration curve provided by the instructor to determine the concentration of copper in a sample of brass digested in acid.

Concepts

  • Spectroscopy
  • UV-Visible spectrum
  • Absorbance and transmittance
  • Beer’s law
  • Calibration curve
  • Electronic transition