November 26, 2024, 06:32:41 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: electric potentials... confused  (Read 4090 times)

0 Members and 1 Guest are viewing this topic.

Offline HgWonder

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
  • Gender: Male
electric potentials... confused
« on: September 07, 2008, 03:59:12 PM »
I am trying to figure out the change in potential when you use a 0.1M solution of KCl instead of a saturated (3.5M) KCl solution in a Calomel electrode.

Pt|Hg|Hg2Cl2|KCl  [0.242V vs NHE]

I applied the Nernst Equation but I wasn't sure if I was calculating this difference properly.  Thanks.   



Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27862
  • Mole Snacks: +1813/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: electric potentials... confused
« Reply #1 on: September 07, 2008, 04:33:03 PM »
Show the equation you are using.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline HgWonder

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
  • Gender: Male
Re: electric potentials... confused
« Reply #2 on: September 07, 2008, 04:53:10 PM »


Red= 3.5
Ox= 0.1
Eo= 0.242
R= 8.314472
T= 298.15
z= 1
F= 96485.309

Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27862
  • Mole Snacks: +1813/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: electric potentials... confused
« Reply #3 on: September 07, 2008, 05:37:07 PM »
No, that's wrong. First of all - what is electrode reaction? Second - what is Hg22+ concentration? How does it depend on [Cl-]?
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info
Pages: [1]   Go Up
« previous next »
Sponsored Links