previous | 7 of 7 return to as tem 7 Part A The Nemst equation is one of the mos

Question

previous | 7 of 7 return to as tem 7 Part A The Nemst equation is one of the most important equations in electrochemistry. To calculate the cel potential at non-standard-state conditions, the equation is For the reaction s 2C03 + (aq) +2Cl" (aq)2Gpt (aq) + Cl2(g). E-0.483 V el oenta at 2C t the concentrations are Co0468 M, Co*)- 0417 M [CI- 0.812M, and [C12-0250 M ? Express your answer with the appropriate units Hints E = E"-2.303 RT log where E is the potential in volts-E" is the standard potential in volts, R is the gas constant, T is the temperature in kelvins, rn is the number of moles of electrons transferred, F is the Faraday constant, and Q is the reaction quotient. At standard temperature, 25 Cor 298 K, the equation has the form E= 1 Value ll Units The reaction quotient has the usual form Submit My Answers Give Up Q products reactants Continue A table of standard reduction potentials gives the voltage at standard conditions, 1.00 M for all solutions and 1.00 atm for all gases. The Nemst equation allows for the calculation of the cell potential E at other conditions of concentration and pressure Microsoft Lync

Explanation / Answer

From Nernst equation

Ecell=Eo -(0.0591/n)*log(K).n= number of electrons transfered

K= ([Co2+]^2[Cl2])/([Co3+]^2[Cl-]^2)

K= (0.417^2*0.250)/(0.468^2*0.812^2)

= 0.301

So Ecell= 0.483-(0.0591/2)*log0.301

= 0.468V

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---