consider a galvanic cell that uses the half reactions 2H+ +e ----- H2 Mg2+ + e ---- Mg - Chemistry -

Question

consider a galvanic cell that uses the half reactions
2H+ +​e ----->H2
Mg2+ + e ----> Mg
write the balanced equation for the cell reaction calculate
E0 cell , Ecell and delta
G0 if concentrartion are 1meach and PH2 = atm

Vartika Jain · Accepted Answer

Dear Student,

At cathode :2H+ + 2e- → H2At anode :Mg2+ + 2e- → MgThe balanced cell reaction is  :Mg + 2H+ → Mg2+ + H2E°cell= E°cathode-E°anode         =E°H+/H2 - E°Mg2+/Mgand,E°H+/H2=0So, E°cell= - E°Mg2+/Mgand, Ecell=E°cell-0
059nlog[Mg2+][H+]2Here, n=2and, ∆G°=-nFE°cellSince the concentration of [Mg2+] and [H+] is not given, also E°Mg2+/Mg is not given, so the value of E°cell, Ecell and G° cannot be calculated

consider a galvanic cell that uses the half reactions 2H+ +​e ----->H2 Mg2+ + e ----> Mg write the balanced equation for the cell reaction . calculate E0 cell , Ecell and delta G0 if concentrartion are 1meach and PH2 = atm .

consider a galvanic cell that uses the half reactions
2H⁺ +e ----->H₂
Mg²⁺ + e ----> Mg
write the balanced equation for the cell reaction . calculate E⁰ _cell , E_cell and delta G⁰ if concentrartion are 1meach and P_H2 = atm .