Palladium, Pd

History Behind Palladium

Palladium was discovered over one thousand years ago, but it was always thought out to be worthless. Everyone was so caught up with mining gold, that this metal was of no significance. In 1801, William Hyde Wollastan worked to isolate palladium from platinum samples. He tried to sell it, but no one was interested in palladium at this time.

Properties of Palladium

Palladium is a silver-white metal with a cubic crystalline like structure. At ordinary temperatures, palladium is strongly resistant to corrosion in air and to the action of acids. When it is divided, it forms a catalyst that speeds up hydrogenation and dehydrogenation reactions.

Uses of Palladium

Palladium is used a lot in an alloy called white-gold. It is used in watch bearings, springs, balance wheels, and also for mirrors in scientific instruments. It is used a lot in electronics like wide screen TV's, computers, and cell phones. Palladium has replaced platinum in reducing the emission from car exhausts.

Compounds

PdCl2- Palladium(II) Chloride

H2PdCl4- Tetracloropalldium(II) Acid

Periodic Table Information

Atomic Number:46

Atomic Mass:106.42 amu

Protons: 46, Electrons: 46, Neutrons: 60

Hyphen Notation: Pd-46, Palladium-46,

46 Palladium

60

Group Properties: Transition Metals (Group 10)

1. White to light grey in color

2. Have a high luster

3. Resistance to tarnish

4. Highly ductile

5. Hard and refractory

6. High melting and boiling points

Reactions

S: 2Pd(s) + O2(g) → PdO(s)

D: PdO(s) → 2Pd(s) + O2(g)

SR: PdH2 + Cl4 → PdCl4 + H2

DR: Pd + 4 HNO3 → Pd(NO3)2 + 2 NO2 + 2 H2O

Palladium Precipitation Tornado in a Jar

Bonding

PdCl2: Palladium Chloride. Ionic bond.

Pd: 60.014%

Cl: 39.986%

Shape: Linear

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Stoichiometry

Equation: Pd + 4 HNO3 → Pd(NO3)2 + 2 NO2 + 2 H2O

Moles: .58 moles


Specific Heat

.240 Joules

You would need 600 Joules to change 100g of palladium by 25 degrees celsius.

Melting Point: 1825 K

Boiling Point: 3413 K

Creativity

P: Pearly white to light grey in color

A: Atomic number 46

L: Luster
L: Looks very close to Platinum

A: Australia contains a lot of palladium
D: Discovered by William Wollaston
I: Important in most modern electronics
U: Used to make dentistry and surgical instruments
M: Mass is 106.42 grams

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Sources

Bentor, Yinon. Chemical Element.com - Palladium. Dec. 3, 2015 <http://www.chemicalelements.com/elements/pd.html>


"Water Treatment Solutions." Palladium (Pd). N.p., n.d. Web. 03 Dec. 2015.


"PALLADIUM." Palladium, Chemical Element. N.p., n.d. Web. 04 Dec. 2015.


"CHEMISTRY I." CHEMISTRY I. N.p., n.d. Web. 11 Dec. 2015.


"Palladium." Palladium. N.p., n.d. Web.


"Palladium: Geological Information." Palladium»geological Information [WebElements Periodic Table]. N.p., n.d. Web. 11 Dec. 2015.