electrochemistry Flashcards
anode gets
oxidized
cathode gets
reduced
an ox
anode is the site of oxidation
red cat
reduction occurs at the cathode
electron flow in the conducting wire
from anode to cathode
the anion from the salt bridge flow to the
anode
the cations from the salt bridge flow to the
cathode
the movement of the _____ ions allows the current in the wire to continue and completes the circuit
salt bridge
cell diagram notation for galvanic cell
anode | anode concentration || cathode concentration | cathode
if concentrations are not specified in the diagram you should assume
1M
in the absence of a salt bridge ___ develops
charge separation
ion-electron pair equation for oxidation
element –> ion + e-
ion-electron pair equation for reduction
ion + e- –> element
oxidizing agent
reduced element; reductant
reducing agent
oxidized element; oxidant
delta G node
NAME?
cell voltage is positive then the reaction is ______
spontaneous
cell voltage is negative then the reaction is ______
nonspontaneous
the more negative the reduction potential, the ________ the reactant is as an oxidizing agent and the __________ product is as an reducing agent
the more negative the reduction potential, the ___weaker_____ the reactant is as an oxidizing agent and the ___stronger_______ product is as an reducing agent
the more positive the reduction potential, the ________ the reactant is as an oxidizing agent and the __________ product is as an reducing agent
the more positive the reduction potential, the ___stronger_____ the reactant is as an oxidizing agent and the ___weaker_______ product is as an reducing agent
faraday
96,500 coulombs
in what case do you multiply the potential the potential of a species
never
the potentials are __________ to the identities of the species involved
intrinsic
electrolytic cells are used for __________
electroplating
electroplating
plating a thin layer of metal on top of the another material
cathode is
galvanic cell:
cathode is
electrolytic cell:
faraday’s law of electrolysis
the amount of chemical change is proportional to the amount of electricity that flows through the cell
for nonstandard conditions, nernst equation
E = E nod - (RT/nF) * ln(Q)
the more negative the reduction potential the _______ the product is as a reducing agent
the more negative the reduction potential the __stronger_____ the product is as a reducing agent
charge is equal to current x time
Q = It
