SCH4U Electrochemistry

Na2SO4, NaCl, KCl, KNO3

common salt bridges

Oxidation Numbers

systematic way to keep track of electrons

Pt, H2(g) at SATP, 1M HCl

conditions for standard hydrogen electrode

Voltaic Cell

pair of solutions generating electric potential

Electrolytic Cell

Splitting aqueous/liquid molecules by supplying electric potential

Discharge

redox rxns removing the charges on the ions

Selective Discharge

only certain ions at the electrode discharges

Brine

NaCl_(aq) is known as

Secondary Cell

redox reaction that can be reversed by supplying external voltage to regenerate the original reactants

Pb(A), PbO(C), H2SO4

elements in lead-acid cell

Cd(A), Ni(OH)4(C), KOH

elements in nickel-cadmium cells

Li+, C(A), LiCoO2(C), polymer membrane

elements involved in lithium-ion cells

H2(Ox), O2(Rd), KOH(OH-) or H3PO3(H+)

elements involved in hydrogen fuel cells

CH3OH and H2O (Ox), O2 (Rd)

elements involved in methanol fuel cell