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What is Brian's Equation for cell potentials?
E cell = E cathode - E anode
EMF
Electromotive Force
SHE
Standard Hydrogen Electrode
SCE
Saturated Calomel Electrode
Calomel (formula)
Hg
2
Cl
2
SCE electrodes aren't good above __
o
C
60
Which responds faster, and SCE or Ag/AgCl electrode?
Ag/AgCl
Electrode of the first kind
A single reaction, the electrode measures its own metal
Electrodes of the Second Kind
Electrode forms a precipitate with an anion a and therefore responds to the anion's concentration.
Example
: Ag/AgCl electrode (Ag senses [Cl])
Can inert redox electrodes measure the absolute concentration of an analyte?
No, they just give you the ratio (good for titrations)
Crystal
Atoms arranged in a repeating 3-D structure
ORP
Oxidation Reduction Potential
(a pH meter mode that gives you mV readings)
What part of the pH calibration equation changes with temperature?
The slope (it's only -0.0592 at 25
o
C)
What kind of crystal is a fluoride ISE?
A single crystal
LaF
3
doped with Eu
2+
TISAB
(give two examples)
Total Ion Strength Adjustment Buffer
NaCl
CaCl
2
Give an example of a mixed crystal electrode
BaSO
4
Author
skinner.cindy
ID
176759
Card Set
Potentiometry
Description
Applied Instrumentation Potentiometry review
Updated
2012-10-16T15:51:09Z
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