PALLADIUM

1
PALLADIUM
http//www.lispme.de/pse/big/46_Pd_1.jpg
Griffin Spencer Block E
2
INTRO TO PALLADIUM

• Discovered by William Hyde Wollaston, a chemist
  from Britain, in 1803.
• He obtained samples of palladium from South
  America.
• Palladium is usually found among platinum,
  nickel, copper, silver, and gold deposits, which
  is how Wollaston found it.
• Name is derived from the asteroid Pallas and the
  Greek goddess of wisdom.

http//www.dprkorea-trade.com/metals/palladium.jpg
3
HISTORY

• Discovered by William Hyde Wollaston
• Discovered in 1801
• Discovered when he was attempting to obtain pure
  samples of platinum
• Discovered in England

http//web.hao.ucar.edu/public/education/sp/images
/wollaston.jpg
Hello!
4
USES FOR PALLADIUM

• Palladium is used to make the following
• Springs for watches
• Used alongside gears and the like in watches.
• Surgical instruments
• Used to strengthen surgical instruments.
• Electrical contacts
• Dental fillings and crowns
• Used to fill cavities, etc.
• Sometimes acts as a catalyst used in
  hydrogenation and dehydrogenation.
• Used to purify hydrogen (see next slide)
• Utilized to make jewelry ex. White gold

http//www.finesurgical.com/Catalog/inst1.GIF
http//www.atlantadentist.com/white_fillings.jpg
5
FUN FACTS

• Hydrogen passes through palladium easily, which
  allows for the easy purification of hydrogen.
• Palladium dichloride (PdCl2), a palladium
  compound, can absorb large amounts of carbon
  monoxide (CO) gas, and is crucial in carbon
  monoxide detectors.
• Palladium is also very soft.

http//www.mncee.org/gifs/codect.gif
6
ISOLATION

• Palladium is available commercially, hence it is
  not necessary to fabricate it in a lab.
• Isolation of Palladium is complex because it
  could be found in ores containing platinum and
  other metals.
• Treatment of the ore with aqua regia ? solution
  containing gold and platinum ? gold then removed
  with iron chloride ?

7
ISOLATION

• (cont.) Platinum precipitated out as (NH4)2PtCl6
  upon treatment with NH4Cl, leaving H2PdCl4 ?
  Palladium precipitated out by treatment with
  ammonium hydroxide and HCl ? This yields
  palladium per method of burning.

8
BIBLIOGRAPHY

• http//www.lispme.de/pse/big/46_Pd_1.jpg. Fred
  Bayers Homepage. Online. lthttp//www.lispme.de/ps
  e/big/46_Pd_1.jpggt 27 Feb. 2006.
• http//www.dprkorea-trade.com/metals/palladium.j
  pg. DPRKorea-TradeOnline. Online.
  lthttp//www.dprkorea-trade.com/metals/palladium.jp
  ggt 24 Feb. 2006.
• http//web.hao.ucar.edu/public/education/sp/image
  s/wollaston.jpg. High Altitude Observatory.
  Online. lthttp//web.hao.ucar.edu/public/education/
  sp/images/wollaston.jpggt 24 Feb. 2006.
• http//www.atlantadentist.com/white_fillings.jpg
  . Atlanta Dental Group. Online. lt
  http//www.atlantadentist.com/white_fillings.jpggt
  23 Feb. 2006.
• http//www.mncee.org/gifs/codect.gif. Center
  for Energy and Environment. Online.
  lthttp//www.mncee.org/gifs/codect.gifgt 27 Feb.
  2006.
• Knapp, Brian. Gale Encyclopedia of Science 2.
  2002 ed.

9
THE END