electro chem

On the online soln of this ques they took E0 for Zn as it is. Shouldn't we multiply it by -ve first since rn is opp? Q 104
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iTeachChem Helper
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iTeachChem
iTeachChem8mo ago
Can you share that solution? From what you are saying, yes zn is at anode so that should happen
Gamertug
GamertugOP8mo ago
In This E0 is 1.53 , only possible of they took Ezn negative, the ans also matches
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iTeachChem
iTeachChem8mo ago
this looks correct to me
Gamertug
GamertugOP8mo ago
How shouldn't E0 be = 0.77 - 0.76 = 0.01
iTeachChem
iTeachChem8mo ago
what is the formula you are using? can you write that down ek baar? see the data in the q. reduction potentials are given of both species
Gamertug
GamertugOP8mo ago
Srp of cell = Srp cathode - Srp anode Standard reducn pt @iTeachChem is this right?
iTeachChem
iTeachChem8mo ago
Bilkul. Ab substitute karo :D Negative of negative is positive na.
Gamertug
GamertugOP8mo ago
In question E0 is neg then we mult it by neg cuz rxn is opp now it is positive. Then we subtract it so E0 = 0.77 - 0.76 = 0.01
iTeachChem
iTeachChem8mo ago
i did not follow what is the 'then we subtract part' 'reaction is opposite' is same as reversing sign
Gamertug
GamertugOP8mo ago
Yes
iTeachChem
iTeachChem8mo ago
so you have done this once already either you reverse the sign OR you subtract doing both does not work :D
Gamertug
GamertugOP8mo ago
Ooooooo
iTeachChem
iTeachChem8mo ago
reversing sign, makes it SOP
Gamertug
GamertugOP8mo ago
Ok got it
iTeachChem
iTeachChem8mo ago
so the eqn would change to SRP cathode + SOP anode.
Gamertug
GamertugOP8mo ago
Ye +solved @iTeachChem
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