Salt Bridge
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Salt Bridge
I know a salt bridge is there to keep both solutions neutral, but what exactly is going on inside the salt bridge that allows it to contribute to the galvanic cell?
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Re: Salt Bridge
A salt bridge allows for the flow of the negative ions that aren't participating in the redox reaction. Remember that we cannot just put aqueous ions in solution, they must dissociate from a solid salt. Those ions can make the charge unbalanced, so having a salt bridge essentially corrects that.
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Re: Salt Bridge
It lets ions flow freely and thus the reaction won't be influenced by all of the free ions.
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Re: Salt Bridge
A salt bridge comes is significant to a galvanic cell because it eases the charge buildup. It allows the ions to transfer when which allows the solutions to stay neutral overtime.
Re: Salt Bridge
nehashetty_2G wrote:A salt bridge comes is significant to a galvanic cell because it eases the charge buildup. It allows the ions to transfer when which allows the solutions to stay neutral overtime.
Why do the solutions need to stay neutral?
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Re: Salt Bridge
005206171 wrote:nehashetty_2G wrote:A salt bridge comes is significant to a galvanic cell because it eases the charge buildup. It allows the ions to transfer when which allows the solutions to stay neutral overtime.
Why do the solutions need to stay neutral?
The solutions need to stay neutral because if the charge builds up, the transfer of electrons from one reaction beaker to another will stop.
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Re: Salt Bridge
In order to maintain electron flow between the anode and cathode, the sites need to be neutrally charged. They are not neutrally charged naturally, because ions are removed from either side as the electrons flow. Thus, the salt bridge allows anions to flow to the anode and cations to flow to the cathode to replace the removed ions and restore neutral charge.
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Re: Salt Bridge
In order to counteract the build up of charge in a galvanic cell, the salt bridge essentially contributes free ions that will not interfere with the redox reaction that is already taking place, it is simply meant to neutralize each side.
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Re: Salt Bridge
The salt bridge is needed to allow ions to flow freely, which will free any charge buildup. It is important for this to occur, because it allows the flow of electrons to be maintained.
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Re: Salt Bridge
Lindsey Chheng 1E wrote:I know a salt bridge is there to keep both solutions neutral, but what exactly is going on inside the salt bridge that allows it to contribute to the galvanic cell?
In order for the two solutions of the Galvanic cell to stay neutral (because there is an exchange of e-), the ions (for example Cl-) move from the right to the left (cathode to anode).
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