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

Introdução

Nome: lead(IV) oxide; lead dioxide
* IUPAC
Número CAS: 1309-60-0
Fórmula química: PbO2
Massa molar: 239.1988 g
Percentual de massa: Pb 86.622 %; O 13.377 % 

Classificação

Usos / Função

• "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

Colagem

Colagem: polar covalent
Ionic Character: 49.70 %

Termoquímica

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

reações

Para maiores informações

Fontes

(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.