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Electroplating. By Eric Urban. BIG QUESTION. Which metals zinc plate the best using electricity?. Hypothesis. I think all my metals will zinc plate the same but some will take longer because in my research I found that different metals take different amounts of time. Interesting Facts.

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electroplating

Electroplating

By Eric Urban

big question

BIG QUESTION

Which metals zinc plate the best using electricity?

hypothesis
Hypothesis
  • I think all my metals will zinc plate the same but some will take longer because in my research I found that different metals take different amounts of time.
interesting facts
Interesting Facts
  • Some plugs are electroplated with gold.
  • It takes an hour to plate with copper.
  • Electroplating is used in many metal-working companies.
  • Pennies have zinc on the inside.
  • The zinc on the inside of a penny is copper-plated then stamped.
materials
Materials
  • Plastic Container
  • Vinegar
  • Water
  • AC Adaptor
  • Alligator clips
  • Zinc Anode
  • Copper Pipe
  • Iron Pipe
  • Aluminum Strip
  • Steel Razor-blade
  • Brass Plate
  • Scale
  • Wire Cutters
  • Stopwatch
procedure
 Procedure
  • Use wire cutters to cut the end off an AC adaptor (Not the side you plug in to a wall). Peal the wires apart and strip the ends. The wire with the white lines on it is positive.
  • Connect the alligator clips to the positive and negative wires.
  • Mix ½ cup of vinegar and ½ cup of water in the plastic container.
  • Weigh the zinc anode and the copper pipe and record the weight for each.
  • Connect the zinc anode to the positive alligator clip. Connect the copper pipe to the negative clip.
  • Place both metals into opposite sides of the plastic container. Be sure not to let them touch each other. Record the time.
  • After 1 hour, remove the metals from the container and disconnect from the alligator clips.
  • Weigh the zinc anode and the copper pipe. Record the weight for each.
  • Repeat steps 4-9 using the aluminum strip instead of the copper.
  • Repeat steps 4-9 using the brass plate instead of the copper.
  • Repeat steps 4-9 using the steel razor-blade instead of the copper.
  • Repeat steps 4-9 using the iron pipe instead of the copper.
controls vairiables
Controls / Vairiables

Controls

Variables

  • The same hunk of zinc was used through the experiment.
  • I used one hour for each metal.
  • I plated different metals.
observations
Observations
  • The zinc turned black.
  • The water heated up.
  • The water turned grey.
  • Gasses could be seen coming from the solution.
analysis of data
Analysis of Data
  • The weight didn't change for any metals throughout the experiment, but the amount of bubbles given off was different for each metal.
  • The copper had a lot of bubbles. The aluminum had many bubbles. The brass didn't have many bubbles. The steel had very many bubbles. The iron had the most bubbles.
  • The experiment tested my hypothesis.
  • I know because some metals plated more or less than others in an hour.
conclusion
Conclusion
  • My hypothesis was some-what correct. I couldn't determine which metals plated more because they all weighed the same before and after the experiment. I determined which metals plated better by looking at the amount of bubbles given off during the experiment. The faster the bubbles were produced, the plating I saw on the metal. Based on this I determined that iron plated the best.
  • I would change the metals because I want to know how other metals plate.
  • These are some questions that I have. Why did the zinc turn black? Why didn't the weight change?
reffrences
Reffrences
  • http://www.artisanplating.com/articles/platinghistory.html (accessed September 20, 2009) “A Short History of Electroplating.”
  • http://www.finishing.com/faqs/howworks.html (accessed September 20, 2009) “Electroplating – How It Works”
  • http://www.fofweb.com/activelink2.asp?ItemID=WE40&SID=5&iPin=E&Singxp0169&SingleRecord=True (accessed September 21 ,2009) “Electroplating.” Historical Inventions on File. Science Online. Facts on File, Inc.
  • http://www.fofweb.com/activelink2.asp?ItemID=WE40&SID=5&iPin=SEOF95&SingleRecord=True (accessed September 21 ,2009) “Brugnatelli’s Electroplating: Luigi Brugnatelli.” Landmark Science Inventions on File. Science Online. Facts on File, Inc.
  • http://en.wikipedia.org/wiki/Plating (accessed September 20, 2009) “Plating”