redox Flashcards
what is a reducing agent
the thing that oxidizes
what is the oxidizing agent
the thing that reduced
the process of oxidation involves
loss of electrons (LEO)
the process of reduction involves
gain of electrons (GER)
what happens to the voltage if pure water is added to half cells
the voltage would decrease
a salt bridge does what
provides a path for ions to migrate between two half cells
what are the steps in balancing redox
split equation, balance major, balance O, balance H, balance charges, make electrons equal and add two half equations together
combination of reduced half cell and oxidation half cell is called
electrochemical/ galvanic cell
anode are where
oxidation occurs
cathode are where
reduction occurs
what is salt bridges function
balance charges
what is most common salt bridge
KNO3
operatiinf electrochemical cells are
not at equilibrium
what is a electrolysis cell
an apparatus in which electrolysis can occur
what is electroplating
a metel to be reduced or plated at a cathode
what prevents rusting
paint/oil/grease
keeping metal cold
catholic protection
initial cell voltage at 25 C is
+1.10V
electrolyte used in alkaline battery is
KOH
the electrolyte in a automobile battery is
H2SO4
to plate a nickel coin with copper the
nickel coin must be at cathode
anode used in commercial production of AL is
Carbon
what is an example of a electrolytic cell
electrowinning, electroplating and charging a car battery
what involves a nonspon redox reaction
electroplating
saiting roads causes more corrosion of cars because
it provides a electrolyte
a electrolytic cell must have what to operate
a power supply
why does painting prevent corrosion
it prevents h20 and o2 from contracting the iron
what does catholic protection work
because if you add some Zn it forces the metal to be the cathode and cannot oxidize
how to electrons move through the cell
they move from the anode to the cathode
what is cell potential once equilibrium is achieved
+0.00V
if a solution goes from 0 to +5 it is
being oxidized
if a solution goes from +3 to -1 it’s being
reduced
