Cliffs AP Chemistry, 3rd Edition

Reduction and Oxidation

Key Terms

Words that can be used as topics in essays:

anode

cathode

disproportionation

electrolysis

electrolytic cell

electromotive force (emf)

Faraday, F

galvanic cell

half-equation

Nernst equation

nonspontaneous reaction

oxidation number

oxidizing agent

redox reaction

redox titration

reducing agent

spontaneous reaction

standard oxidation voltage, E°ox

standard reduction voltage, E°red

standard voltage, E°

voltage

voltaic cell

Key Concepts

Equations and relationships that you need to know:

• E°= E°ox+ E°red


• For the reaction: aA+ bB →cC + dD
  Nernst equation:

EE ..log log

n AB

CD

0 0592 abE 0 0592n Q

cd

=-%%=-

^^

^^

hh

hh

at 25°C

E°−(RT/nF) lnQ= E°−(2.303 RT/nF) log Q

total charge = nF

1 F= 96,487 coulombs/mole = 96,487 J/V ⋅mole

• potential V()=chwork Jarge C()()
  1 ampere = rate of flow of electrons, measured in coulombs/sec or amps
  electrical energy (work) = volts ×coulombs = joules


• E===-qwwherewqwork, change


• ∆G= wmax= −nFE