Sign of E when anode rxn reverses
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Sign of E when anode rxn reverses
As i am doing the homework questions (specifically #11-15) I noticed the solutions manual reverses the anode reaction in every problem but only sometimes changes the sign of . I am confused on why the sign is not being switched every time the anode reaction is reversed? How do we know when we're supposed to reverse the anode reaction AND change the sign of ?
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Re: Sign of E when anode rxn reverses
if you use the equation Ecell= Ecathode - E anode then you dont have to switch the sign from the table
if you use the equation E cell= Ecathod + E anode then you do have to switch the sign from the table
if you use the equation E cell= Ecathod + E anode then you do have to switch the sign from the table
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Re: Sign of E when anode rxn reverses
Since the table explicitly shows reduction potential values, you just need to make sure that you place them in the proper equations. As said above, using the Ecathode - Eanode will always give you the correct answer, but using the Ecathode +Eanode would require some sign-changing for the original value in the table.
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