Salt Bridge

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Samantha Kan 2L
Posts: 30
Joined: Sat Jul 22, 2017 3:00 am

Salt Bridge

Postby Samantha Kan 2L » Tue Feb 06, 2018 7:33 pm

Is there always a salt bridge? If not, when would a salt bridge be used?

Naveed Zaman 1C
Posts: 62
Joined: Fri Sep 29, 2017 7:04 am
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Re: Salt Bridge

Postby Naveed Zaman 1C » Tue Feb 06, 2018 7:52 pm

It might not be included in a diagram that's provided to you. Basically, a salt bridge just helps to keep electrons flowing throughout the cell. Without a salt bridge, the electrons would flow from anode to cathode and would build up in the cathode portion. Eventually, since all the electrons are already on the cathode side, the reaction will stop because no more electrons will want to go to the side that already has too many electrons.The salt bridge just pushes electrons back from the cathode to the anode so that we get a consistent voltage going on all the time (at least until the reaction runs out). Keep in mind that the anode metal gets consumed in the process, so even if we have electrons consistently flowing throughout the cell, the reaction will have to eventually end when there is no more anode metal left.

AnuPanneerselvam1H
Posts: 52
Joined: Fri Sep 29, 2017 7:07 am

Re: Salt Bridge

Postby AnuPanneerselvam1H » Thu Feb 08, 2018 9:34 pm

Even if the diagram does not show a salt bridge, I think it is safe to assume that there is a salt bridge in all redox reactions. If there were no salt bridge there would be a buildup of elections in the cathode and after a certain point, electron flow would stop because of the charge buildup. By having a salt bridge we are preventing this electron repulsion and allowing the redox reaction to continue.

Jennifer Ho 1K
Posts: 31
Joined: Thu Jul 13, 2017 3:00 am

Re: Salt Bridge

Postby Jennifer Ho 1K » Thu Feb 08, 2018 9:45 pm

There has to be a salt bridge in the cell so that the electrons can flow cyclically, as they would build up in the cathode otherwise.

Sarah Wax 1G
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Joined: Sat Jul 22, 2017 3:00 am

Re: Salt Bridge

Postby Sarah Wax 1G » Sun Feb 11, 2018 10:41 pm

Like in lecture, a salt bridge keeps overall potential neutral, without which, electrons would build up at the cathode. A salt bridge must be used in order for the Galvanic cell to work.

Humza_Khan_2J
Posts: 56
Joined: Thu Jul 13, 2017 3:00 am

Re: Salt Bridge

Postby Humza_Khan_2J » Thu Feb 15, 2018 10:04 am

If there was no salt bridge, the reaction would simply stop as there would be no replenishment electrons on the anode side. A salt bridge is present in pretty much all the problems we deal with because it keeps the reaction going for us to analyze.

Irma Ramos 2I
Posts: 51
Joined: Fri Sep 29, 2017 7:07 am

Re: Salt Bridge

Postby Irma Ramos 2I » Thu Feb 15, 2018 1:23 pm

A salt bridge is needed because it allows for the ion transfer, thus keeping the solutions neutral.

Julie Steklof 1A
Posts: 50
Joined: Thu Jul 13, 2017 3:00 am

Re: Salt Bridge

Postby Julie Steklof 1A » Thu Feb 15, 2018 11:58 pm

A salt bridge keeps the solutions in each cell neutral and allows the redox reaction to continue.


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