Wednesday, 9 July 2014

Materials Needed

Materials and Equipment 

  • 9V batteries (4)
  • 22-gauge electrical wire
  • Alligator clips (12)
  • Wire cutters and strippers
  • Breadboard, about 3" x 2"
  • 10K Ohm resistor
  • Voltmeter/Multimeter (must be able to read 10 millivolts)
  • Coke
  • Cup or jar that the nickel metal strips can completely fit inside (1); must be taller than 5 inches.
  • 250 mL beaker
  • Small Styrofoam block
  • Nickel metal strips (2); strips should be approximately 5 inches tall and ¾ inch wide.
  • Ruler
  • 0.1 M phosphate buffer solution, pH 7.0 (500ml)
    • This buffer should contain 2.63 g monopotassium phosphate (KH₂PO₄) (FW 136.09 g/mol) and 4.35 g sodium phosphate (Na₂HPO₄) (FW 141.96 g/mol) (to lower the pH to 7.0) and brought to 500 mL using deionized (DI) water for a total phosphate concentration of 0.1 M.
  • Magnetic stir plate and stir bar (1) 
  • Pair of disposable gloves
  • Metal scoop for chemicals
  • Cobalt Nitrate (10 g)
  • Clock or stopwatch
  • Lab notebook
  • Electrical Magnetic Stirrer

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