Galvanic Cells: A galvanic cell is an electrochemical cell that consists of two half-cells connected by an external circuit. These half-cells are connected...
Galvanic Cells:
A galvanic cell is an electrochemical cell that consists of two half-cells connected by an external circuit. These half-cells are connected to a salt bridge, which allows the flow of ions between them. The overall reaction that occurs in a galvanic cell is:
The anode is the electrode where oxidation occurs, and the cathode is the electrode where reduction occurs.
Nernst Equation:
The Nernst equation is a mathematical equation that relates the cell potential to the concentrations of reactants and products in a electrochemical cell. The Nernst equation is:
Where:
E is the cell potential in volts
E° is the standard cell potential in volts
R is the ideal gas constant (8.314 J/mol·K)
T is the temperature in Kelvin
n is the number of moles of electrons transferred in the balanced chemical reaction
F is the Faraday constant (96,485 C/mol)
Q is the reaction quotient
The Nernst equation allows us to calculate the cell potential under non-standard conditions by taking into account the concentrations of reactants and products