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### Salt Bridge

Posted: Sun Feb 23, 2020 3:18 pm
Can someone explain to me what the purpose of the salt bridge is?

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 3:38 pm
A salt bridge allows ions transfer. It keeps the 2 solutions on cathode and anode side neutral.

In addition in the worksheet that Dr. Lavelle posted on his website he states, "The half cells are connected by a salt bridge that allows the negatively charged spectator ions in solution to move from one half-cell (cathode) to the other (anode) to prevent charge buildup, so that the reaction can continue.

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 3:40 pm
The purpose of the salt bridge is to maintain the neutral charge in the solutions as electrons flow between the two solutions.

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 3:52 pm
Without a salt bridge, because the anode becomes more positive overtime and the cathode becomes more negative overtime, the cell would no longer cause a transfer of electrons. Electrons would have no reason to leave the anode to the cathode, which is negatively charged (like charges repel each other / opposites attract). The salt bridge neutralizes each solution and allows for this transfer of electrons to continue. Hope this helps!

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 4:00 pm
It is to transfer electrons. A missing salt bridge will result in a more positive charge in the anode and a more negative charge in the cathode. In order to keep these charges neutral, the salt bridge allows electrons to travel from the anode to the cathode

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 4:07 pm
the salt bridge transports electrons from the anode to the cathode

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 4:09 pm
I believe the best way to understand the concept of a salt bridge is to liken it to a closed circuit. In order for a circuit to be complete, there must be a closed-loop in order for charges of positives and negatives to get balanced and have somewhere to go. The salt bridge essentially completes the circuit and closes that loop preventing a charge build-up that prevents the circuit from flowing.

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 5:17 pm
The purpose of a salt bridge is to maintain charge as the electrons are transferred from the anode to cathode

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 5:25 pm
The salt bridge ensures that the solution in the anode and the cathode stays neutral. Since electrons are being transferred as the redox reaction occurs, the charges of the anode and the cathode are changing. The salt bridge dispenses ions as they change to ensure that there is no polarization that would make the redox reaction unfavorable.

### Re: Salt Bridge

Posted: Sun Feb 23, 2020 5:26 pm
the salt bridge releases + and - ions into each side of the battery and maintains a neutral charge. for example, when Zn turns into Zn2+, it will bond with the Cl- ions of NaCl to prevent an overly positive cell. hope this helps!