A galvanic cell is constructed with Ag+ Ag and Fe3+ Fe2+ electrodes Find the concentration of Ag+ at which - Chemistry - Electrochemistry

Question

A galvanic cell is constructed with Ag+?Ag and Fe3+?Fe2+ electrodes
Find the concentration of Ag+ at which the emf of the cell is zero
at equimolar concentration of Fe2+ and Fe3+ E*Ag+/Ag= 0 80V and
E*Fe3+/Fe2+= 0 77V

Geetha · Accepted Answer

The given cell isAnode : Fe2+ → Fe3+ + e-Cathode: Ag+ + e- → Ag--------------Fe2+ + Ag+→ Fe3+ + Ag------------E0 = EFe2+/Fe3+0 +  EAg+/Ag0    = - 0
77 + 0 80    = 0
03 VGiven that E =0E = E0 - 0
0591n log [RHS][LHS]becomesE0 = 0
0591n log [RHS][LHS]  0 03  = 0
05911 log [Fe3+] [Ag][Fe2+] [Ag+]0
03 = 0
05911 log 1 [Ag+]   {since the concentration of [Ag]= 1 and [Fe2+] = [Fe3+] }0
03 = 0 05911 log  [Ag+]-10
03 = - 0
0591 log  [Ag+] log  [Ag+] = - 0
03 0 0591      = - 0
5076[Ag+] = A log [- 0
5076]     = 0 3107

A galvanic cell is constructed with Ag+?Ag and Fe3+?Fe2+ electrodes. Find the concentration of Ag+ at which the emf of the cell is zero at equimolar concentration of Fe2+ and Fe3+. E*Ag+/Ag= 0.80V and E*Fe3+/Fe2+= 0.77V

A galvanic cell is constructed with Ag+?Ag and Fe3+?Fe2+ electrodes. Find the concentration of Ag+ at which the emf of the cell is zero at equimolar concentration of Fe2+ and Fe3+. EAg+/Ag= 0.80V and EFe3+/Fe2+= 0.77V