Electrochemistry

Created by

Isabelle

Cards (23)

what is electrochemistry? 
The movement of charged particles such as ions or electrons
what is resistance dependent on?
sample geometry
what is the reciprocal of resistivity?
conductivity
what is conductivity? 
The intrinsic ease with which current can flow through a material of any shape
what is conductivity dependent on?
Number of ions present
what occurs to molar conductivity in strong electrolytes?
decreases only lightly as concentration increases
what occurs to molar conductivity in weak electrolytes? 
Molar conductivity is normal at very low conc but drops sharply to low values when the concentration departs significantly from zero
what is the grotthus mechanism?
Ion transport mechanism in electrolytes.
what is mobility related to?
size and charge of ion
what makes up a daniell cell? 
Two half-cells connected by a salt bridge: a zinc electrode in a zinc sulfate solution and a copper electrode in a copper sulfate solution.
what is cell potential? 
Measure of potential difference between the two electrodes
what is another word for cell potential?
electromotive force, voltage
what is the letter for liquid junction potential? 
Eij
how to remove an Eij? 
salt bridge
How are the electrode written?
as reduction
what does a positive cell potential indicate?
reaction will occur spontaneously
what is temperature dependence? 
how cell potential changes with temp, accessed by entropic
what is the most widely used reference electrodes?
silver-silver chloride
what is a calomel electrode? 
Uses mercury in contact with mercurous chloride, (another comparision electrode)
what makes up a glass electrode? 
Tube terminating in a thin-walled glass bulb, permeable to H+
what is contained within a glass electrode?
silver-silver chloride,
how do lithium ion batteries work?
intercalating Li ions within two different layered materials on each side of the battery
issues with sodium ion batteries?
Larger more difficult to move through solid electrodes