LEAD(IV) OXIDE - (1309-60-0)

Introduction

Name: lead(IV) oxide; lead dioxide
* IUPAC
CAS Number: 1309-60-0
Chemical Formula: PbO2
Molar Mass: 239.1988 g
Mass Percent: Pb 86.622 %; O 13.377 % 

Classification

• inorganic

Uses/Function

• "imperfections in the crystal (lattice defects) make lead(IV) oxide an electrical conductor, since the oxide ions can jump from hole to hole. This makes possible the use of lead(IV) oxide as an electrode (the cathode) in the lead storage battery." 1

• "Electrodes in batteries; oxidizing agent in the manuf[acturing] dyes; as discharge in dyeing with indigo; manuf[acturing] rubber substitutes; with amorphous phosphorus as ignition surface for matches; pyrotechny; manuf[acturing] pigments; in anal[ytical] chemistry." 2

Bonding

Bonding: polar covalent
Ionic Character: 49.70 %

Thermochemistry

ΔHf° (s): -65.6 kcal/mol 3 = -274.47 kJ/mol
S° (s): 17.16 cal/(mol•K) 4 = 71.80 J/(mol•K)
ΔGf° (s): -51.5 kcal/mol 5 = -215.48 kJ/mol

Reactions

For More Information

Sources

(1) - Zumdahl, Steven S. Chemistry, 4th ed.; Houghton Mifflin: Boston, 1997; pp 890-891.
(2) - The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals, 13th ed.; Budavari, S.; O'Neil, M.J.; Smith, A.; Heckelman, P. E.; Kinneary, J. F., Eds.; Merck & Co.: Whitehouse Station, NJ, 2001; entry 5425.
(3) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(4) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(5) - Dean, John A. Lange's Handbook of Chemistry, 12th ed.; McGraw-Hill Book Company: New York, NY, 1979; p 9:4-9:94.
(6) - Halka, Monica and Nordstrom, Brian. Metals & Metalloids; Infobase Publishing: New York, NY, 2011; pg. 66.
(7) - Halka, Monica and Nordstrom, Brian. Metals & Metalloids; Infobase Publishing: New York, NY, 2011; pg. 61.