Where to find Ecell values
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 111
- Joined: Fri Aug 09, 2019 12:16 am
Where to find Ecell values
Can someone point me to where to find a table of reduction potentials for common half reactions? Either in the book or on Lavelle's website...can't seem to find it
-
- Posts: 107
- Joined: Fri Aug 02, 2019 12:15 am
Re: Where to find Ecell values
The Ecell values can be found in the back of the textbook in Appendix 2B.
-
- Posts: 99
- Joined: Sat Sep 07, 2019 12:16 am
Re: Where to find Ecell values
Its in the book at Appendix 2B. (After Chapter 11 but before the answer key)
-
- Posts: 130
- Joined: Fri Aug 30, 2019 12:16 am
Re: Where to find Ecell values
Appendix 2B has them and remember they are all given as reduction potentials. Keep that in mind while calculating the standard potentials
-
- Posts: 97
- Joined: Sat Jul 20, 2019 12:15 am
Re: Where to find Ecell values
Does anyone know when you would flip the sign in a half relation? I know that if you flip the equation the sign flips, but then do you not do this when calculating E(cell)? like if they give you the E value in the problem and the equation has to be flipped do you flip the sign?
Re: Where to find Ecell values
My TA talks about the "e-chem series" and how if the value is higher then it has more oxidizing/reducing power, but what is the e-chem series?
-
- Posts: 100
- Joined: Wed Sep 18, 2019 12:15 am
-
- Posts: 111
- Joined: Wed Sep 18, 2019 12:19 am
Re: Where to find Ecell values
AKatukota wrote:Does anyone know when you would flip the sign in a half relation? I know that if you flip the equation the sign flips, but then do you not do this when calculating E(cell)? like if they give you the E value in the problem and the equation has to be flipped do you flip the sign?
The Ecell values given in Appendix 2B are for the reduction half reaction. You would flip the sign of the Ecell value and the equation if you were looking for the oxidation half reaction, and vice versa.
Re: Where to find Ecell values
gabbymaraziti wrote:AKatukota wrote:Does anyone know when you would flip the sign in a half relation? I know that if you flip the equation the sign flips, but then do you not do this when calculating E(cell)? like if they give you the E value in the problem and the equation has to be flipped do you flip the sign?
The Ecell values given in Appendix 2B are for the reduction half reaction. You would flip the sign of the Ecell value and the equation if you were looking for the oxidation half reaction, and vice versa.
In addition to this, what helps me is I just subtract the oxidation half reaction from the reduction half reaction, basically just flipping the sign anyways. Just be careful not to change the sign twice as he mentioned in class
-
- Posts: 100
- Joined: Wed Sep 11, 2019 12:17 am
-
- Posts: 49
- Joined: Sat Sep 07, 2019 12:18 am
-
- Posts: 125
- Joined: Sat Jul 20, 2019 12:16 am
-
- Posts: 99
- Joined: Sat Sep 14, 2019 12:17 am
Re: Where to find Ecell values
Appendix 2B. I googled one table for Ecell values but calculations based on those were not the same as the solution manual.
-
- Posts: 51
- Joined: Sat Aug 24, 2019 12:16 am
Re: Where to find Ecell values
Appendix 2B but make sure that to manipulate the values when the reaction is flipped.
Return to “Work, Gibbs Free Energy, Cell (Redox) Potentials”
Who is online
Users browsing this forum: No registered users and 7 guests