Question

The reduction potential for the following non-standard half cell at 298K is ______ volts.

F₂ (1.54×10^-3atm) + 2e^-2F^- (1.03M)

Answer 1

Reduction potential for the following itial for the following non-standard half Cell Potential at 298k is Volts Ez (1-54x103 atm) + 2e 26 (1.03M)

For finding non-standard half-cole potential we use Nesnest Equation :- Eccel = Erre 0.059 2030 Eree > Non-standard cell potential Ecce Standard cell potential n Nomber of moles of elections thansferred in the reaction & Reaction Quotient

Roof of Nomest Equation - As we know that Gibbs Free Energy AG= sao + Rt enco) f AG=nF Erell -nf Eren -nf Ecelet Rrence) -Ereee = Econt RT nt enco) - Eccee = Ecell + 2.303RT log(0) ne R= 8.314 Imolk T= 298k F Fardays constant (965w cance) Eren - Eren looro) n A Standard Nemest Equation

For Ecere we have to find first Eron, value of a And & C Reaction Quotient) Now find Eren, and Value of n; We have given a half rell Reaction: Farg) + ze we 2f-can) 2.87v Value of n Effig FC81/ Flow Ecce = 2.87 v a T For half reel Reduction Potential You can see these Values from Internet or books n = 2

Now we have Een and value ofn, then we find Q (Reaction Quotient) Lets see how to find Reaction Quotient (Q): aa+b1B +dD Q=[6] [D]d {aža [B] We write concentrations if states are ein gaseus (2) or ageouslags state, for liquid (e) and solides) State concentration is equal to 1. Now we find a (Reaction quotient) for half cell Cole Reaction, Facg) +20+ -> 2F Cai) ? (PF3) Г state Pressure of Fz (for gaseous Pressure is given) [F] = 1.03m PF 2 = 1:54x103 atm

Q = (1.03)2 1.54 x 10-3 0.689 x 103 Q-6-89 xlo? Reaction Quotient for given half cell Reaction Now we have value of Erere, in and a Now we find Ecere Using Nemest Equation; - Exen Excel - 0.059 looco Erece = 2.87 n=2 Q=639 X 102 Eceee = 2.877 -0.059 log(5.89% 10%) Erece 2 - 2.82 1059 (log(689) + logCl2)) = 2.82 0.059 (0.84- 0.84+ 2) F2.82 O 059 X2184 Erere = 2-32- 0 083 = 2.78 V Eccee = 278 v Reduction potential for given half rell Reaction at 298k is 2.78V.