How does a salt bridge improve a battery?

1 Answer
May 8, 2016

Answer:

The role of the salt bridge is to assure the neutrality of both compartments.

Explanation:

The salt bridge is necessary for a galvanic (or voltaic) cell to keep operating. Without a salt bridge, the cell would stop right after few seconds of the start.

The role of the salt bridge is to assure the neutrality of both compartments.

Remember, the anode solution gets more positive with time, and the cathode solution gets more negative with time, which will affect the electrons circulation within the cell.

The salt bridge therefore, will pump negative ions (or anions) into the anode compartment and position ions (or cations) into the cathode compartment.

Here is a video that I made on this topic, I highly recommend it:
Electrochemistry | The Galvanic Cell.