Both electrodes in same electrolyte? [Electrochemical cell]

Thread starter Kqwert
Start date May 12, 2019
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Cell Electrochemical cell Electrodes

In summary, an electrochemical cell is a device that converts chemical energy into electrical energy through the use of two electrodes immersed in an electrolyte solution. When both electrodes are placed in the same electrolyte, a chemical reaction occurs at the interface, creating a flow of electrons and an electrical current. The purpose of having both electrodes in the same electrolyte is to create a closed circuit for the flow of electrons and to maintain charge balance. The advantages of this setup include a more efficient and stable flow of electrons, resulting in a more reliable and long-lasting cell. However, a potential disadvantage is the depletion of the electrolyte over time, which can decrease the efficiency of the cell and may require replenishment or replacement.

May 12, 2019

Kqwert

Homework Statement: Hello,

In 9/10 cases when working with electrochemical cells, I draw two chambers, where the electrodes are connected by a wire and the two cells by a salt bridge. The role of the wire is to lead the electrons from the anode to the cathode where as the role of the salt bridge is to balance the charge differences that occur due to the movement of electrons.

I do however also remember to have seen situations where the two electrodes are placed in the same chamber.

So my question is: in what scenarios can one actually make an electrochemical cell with only one electrolyte, instead of two electrolytes connected by a salt bridge?

Relevant Equations: .

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May 12, 2019

Borek

Mentor

For example https://en.wikipedia.org/wiki/Electrowinning

What is an electrochemical cell?

An electrochemical cell is a device that converts chemical energy into electrical energy. It consists of two electrodes, an electrolyte, and a separator. The two electrodes are made of different materials and are immersed in the same electrolyte solution, which allows ions to move between them and complete the circuit.

How does an electrochemical cell work?

An electrochemical cell works by using a redox reaction to generate electricity. The two electrodes, which are made of different materials, have different affinities for electrons. When the cell is connected to an external circuit, electrons flow from the electrode with a higher affinity to the one with a lower affinity, creating a flow of electricity.

What is the purpose of having both electrodes in the same electrolyte?

The purpose of having both electrodes in the same electrolyte is to allow for the flow of ions between them. This completes the circuit and allows for the transfer of charge, which is necessary for the cell to produce electricity. Having both electrodes in the same electrolyte also helps to maintain a constant concentration of ions, which is important for the cell's efficiency.

What happens if the electrodes are not in the same electrolyte?

If the electrodes are not in the same electrolyte, the flow of ions between them is hindered, and the cell will not be able to produce electricity efficiently. This can also lead to imbalances in the concentration of ions, which can affect the cell's performance. Therefore, it is important to have both electrodes in the same electrolyte for the cell to function properly.

Can the same electrolyte be used for different types of electrochemical cells?

Yes, the same electrolyte can be used for different types of electrochemical cells. However, the specific electrolyte used may vary depending on the materials used for the electrodes and the desired redox reaction. It is important to choose an electrolyte that is compatible with the materials and redox reactions involved in the specific electrochemical cell.