Function of salt bridge

In summary, a salt bridge in a galvanic cell has the purpose of maintaining electrical neutrality by allowing ions to flow between the two half-cells. It prevents the buildup of excess charge and cannot be replaced with other materials. If the salt bridge becomes clogged or damaged, the cell may no longer produce a current. While not all galvanic cells require a salt bridge, it is necessary in most cases for proper functioning.
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What is the function of salt bridge in a daniell cell?Why KNO3 is used in salt bridge ?
 
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One electrode is the anode half reaction; the other electrode is the cathode half reaction. How do you complete a circuit?

(Maybe before I responded I should have searched for information about Daniel cell).

You may find this article about salt bridge informative:
http://en.wikipedia.org/wiki/Salt_bridge
 
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1. What is the purpose of a salt bridge in a galvanic cell?

The function of a salt bridge in a galvanic cell is to maintain electrical neutrality in the two half-cells. It allows ions to flow between the two half-cells, completing the circuit and allowing the redox reactions to occur.

2. How does a salt bridge prevent the buildup of excess charge in a galvanic cell?

A salt bridge contains a solution of a strong electrolyte, such as potassium chloride, which is able to conduct ions between the two half-cells. This prevents the buildup of excess charge in either half-cell, ensuring that the cell can continue to function properly.

3. Can a salt bridge be replaced with any other material?

No, a salt bridge is specifically designed to allow the flow of ions between the two half-cells in a galvanic cell. Other materials may not have the same conductivity or ability to maintain electrical neutrality, making them ineffective replacements.

4. What happens if the salt bridge in a galvanic cell becomes clogged or damaged?

If the salt bridge becomes clogged or damaged, the flow of ions between the two half-cells will be disrupted. This can lead to an imbalance of charges and result in the cell no longer being able to produce a current.

5. Do all galvanic cells require a salt bridge?

No, not all galvanic cells require a salt bridge. Some cells, such as those in rechargeable batteries, have a porous barrier between the two half-cells that allows for the flow of ions while still maintaining electrical neutrality. However, in most cases, a salt bridge is necessary for the proper functioning of a galvanic cell.

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