Salt Bridge

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Emily Ng_4C
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Salt Bridge

Postby Emily Ng_4C » Fri Feb 22, 2019 12:29 pm

What is the purpose of the salt bridge?

Lorena Zhang 4E
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

Re: Salt Bridge

Postby Lorena Zhang 4E » Fri Feb 22, 2019 12:31 pm

e- transfer from one "reaction beaker" to another will stop due to charge buildup. Therefore, a salt bridge is necessary to allow ion transfer so that the two solutions would stay neutral.

Tarika Gujral 1K
Posts: 62
Joined: Fri Sep 28, 2018 12:27 am

Re: Salt Bridge

Postby Tarika Gujral 1K » Fri Feb 22, 2019 1:02 pm

At the anode, oxidation occurs, which leads to the buildup of positively charged ions.
At the cathode, reduction occurs, which leads to the buildup of negatively charged ions.

As Lorena said, the buildup of these charges will eventually stop e- flow from anode to cathode. To maintain this flow, the salt bridge is used to transport positively charged ions to cathode and negatively charged ions to anode.

Xinyi Zeng 4C
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

Re: Salt Bridge

Postby Xinyi Zeng 4C » Fri Feb 22, 2019 4:49 pm

Just to add on, the salt bridge prevents direct mixing but allow passage of ions between the two half-cells, competing the electrical circuit!

JT Wechsler 2B
Posts: 62
Joined: Fri Sep 28, 2018 12:16 am

Re: Salt Bridge

Postby JT Wechsler 2B » Fri Feb 22, 2019 5:59 pm

At the anode, there is a buildup of positively charged ions and at the cathode, there is a buildup of negatively charged ions. To prevent this buildup of charge from being too great and stopping the reaction, a salt bridge adds positively charged ions to the cathode and negatively charged ions to the anode.

Aria Soeprono 2F
Posts: 64
Joined: Fri Sep 28, 2018 12:27 am

Re: Salt Bridge

Postby Aria Soeprono 2F » Fri Feb 22, 2019 8:50 pm

What would be the purpose of using a porous disk instead of a salt bridge?


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