Calculate The Ecell for The Following Equation Cu Ag

What is Ecell?

The standard electrode potential (Ecell) is a measure of the tendency of a chemical species to acquire electrons and thereby be reduced. It is expressed in volts (V) and is used to predict the direction of electron flow in redox reactions.

For a galvanic cell, the standard cell potential (Ecell) is the potential difference between the two half-cells when all reactants are in their standard states (1 M concentration for solutes, 1 atm pressure for gases, and pure solids or liquids).

How to Calculate Ecell

The standard cell potential can be calculated using the following formula:

Where:

• Ecell is the standard cell potential in volts (V)
• Ecat is the standard reduction potential of the cathode (more positive) in volts (V)
• Ean is the standard reduction potential of the anode (more negative) in volts (V)

For the Cu/Ag redox reaction, the standard reduction potentials are:

• Ecat (Ag+) = +0.80 V
• Ean (Cu2+) = +0.34 V

Example Calculation

Let's calculate the standard cell potential for the Cu/Ag redox reaction using the formula:

This means the standard cell potential for the Cu/Ag redox reaction is 0.46 volts.

Interpretation of Results

A positive Ecell value indicates that the reaction is spontaneous and will proceed in the direction written. In this case, the Cu/Ag redox reaction is spontaneous with a standard cell potential of 0.46 volts.

The magnitude of Ecell also indicates the driving force of the reaction. A larger Ecell value means a stronger driving force for the reaction to occur.