Respuesta :
Answer:
The cell potential for this reaction is 1.955 V
Explanation:
Step 1: Data given
Molarity of Fe^2+] = 3.30 M
Molarity of [Mg^2+] = 0.310 M
Temperature = 71°C
E∘ standard potential = 1.92 V
Step 2: The balanced equation
Mg(s) +Fe2+(aq) → Mg^2+(aq) +Fe(s)
Step 3: Nernst equation
E = Eo - RT/nF ln Q
⇒with E° = the standard potential = 1.92 V
⇒with R = 8.314 J/K*mol
⇒with T = the temperature =344 K
⇒with n = the number of electrons transfered = 2
⇒with F = Constant of Faraday F = 96500 C/mol
⇒ with Q = [Mg^2+]/[Fe^2+] = 0.310 / 3.30 = 0.094
E = 1.92 -8.314*344 /(2*96500) * ln (0.094)
E = 1.92 -8.314*344 /(2*96500) * (-2.365)
E = 1.955 V
The cell potential for this reaction is 1.955 V
