What is the function of salt bridge in a daniell cell?Why KNO3 is used in salt bridge ?
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.
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.
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.
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.
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.