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According to wikipedia the reduction of AgCl (s) to give Ag (s) and $Cl^-$ (aq) has reduction potential of 0.22 V . But it also says tha the reduction of $Ag^+$ (aq) to give Ag (s) has reduction potential of 0.80 V . In the former reaction the oxidation state of +1 and gets reduced to zero oxidation state and chloride acts as spectator ion whereas the same happens in the latter reaction just without the chloride ion. Also I believe silver chloride is a strong electrolyte and dissociates completely. So my question is If both the reactions are exactly identical then why isn't there reduction potential same ? I am super confused, any help will be highly appreciated.

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  • $\begingroup$ 1) AgBr not AgCl? Check again perhaps? 2) AgCl isn't a strong electrolyte at all 3) See Why the reduction potential of the reaction AgCl (aq) /Ag + Cl- is +0.22V $\endgroup$ – orthocresol Dec 30 '16 at 11:16
  • $\begingroup$ Sorry that was a typo it is agcl $\endgroup$ – Matt Dec 30 '16 at 11:23
  • $\begingroup$ Ok if agcl is insoluble in water then how is it electrolysed is it done in molten state? $\endgroup$ – Matt Dec 30 '16 at 11:24
  • $\begingroup$ AgCl will dissolve better in a NaCl (aq) or NH4OH solution. $\endgroup$ – DrMoishe Pippik Dec 30 '16 at 20:04

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