salt bridge

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Sarah Blake-2I
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salt bridge

Postby Sarah Blake-2I » Wed Mar 11, 2020 3:58 pm

What is a salt bridge made up of and what is its purpose?

sbeall_1C
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Re: salt bridge

Postby sbeall_1C » Wed Mar 11, 2020 4:15 pm

In a Galvanic cell, electrons flow form the anode to the cathode which results in solutions holding charges. The anode will become positive as it loses electrons, and the cathode solution will becomes more negative as it gains electrons. The salt bridge is put in place to neutralize the solutions. The negative ions from the salt (NO3-, if the salt is NaNO3 for example) will flow towards the anode to balance the positive charge forming, and the positive ion from the salt (Na+ for example) will flow towards the cathode to balance the negatively charged solution.

Shivam Rana 1D
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Re: salt bridge

Postby Shivam Rana 1D » Wed Mar 11, 2020 4:16 pm

Salt bridge is usually made of inert anions and cations that balance out charge buildup.

Anna Heckler 2C
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Re: salt bridge

Postby Anna Heckler 2C » Wed Mar 11, 2020 4:39 pm

The purpose of a salt bridge is to maintain charge balance because the electrons are moving from one half cell to the other. Without a salt bridge, the solution in the anode compartment would become positively charged and the solution in the cathode part would become negatively charged. This would create a charge imbalance that would cause the reaction to stop.

EMurphy_2L
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Re: salt bridge

Postby EMurphy_2L » Wed Mar 11, 2020 4:43 pm

a porous disk can also be used for this purpose! that's just a membrane which balances charge

ValerieChavarin 4F
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Re: salt bridge

Postby ValerieChavarin 4F » Thu Mar 12, 2020 8:20 am

The salt bridge is essentially meant to neutralize solutions and balance the charges which occur due to the transfer of electrons in a redox reaction.

Alexandra Bartolome 2H
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Joined: Sat Jul 20, 2019 12:17 am

Re: salt bridge

Postby Alexandra Bartolome 2H » Thu Mar 12, 2020 9:34 am

The purpose of the salt bridge is to prevent charge buildup; it is made up of a concentrated aqueous salt solution in an inverted, U shaped tube that allows the flow of ions that don't affect the cell reaction.

Mariah
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Re: salt bridge

Postby Mariah » Thu Mar 12, 2020 9:36 am

It just allows electrons to flow I think.

Jacob Motawakel
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Re: salt bridge

Postby Jacob Motawakel » Thu Mar 12, 2020 2:25 pm

the salt bridge allows the flow of ions between the anode and cathode solutions.

Christine Honda 2I
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Re: salt bridge

Postby Christine Honda 2I » Thu Mar 12, 2020 3:03 pm

I remember seeing somewhere that certain salts are not ideal for salt bridges... does anyone have an idea of what salts these include?

Alfred Barrion 2H
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Re: salt bridge

Postby Alfred Barrion 2H » Thu Mar 12, 2020 3:10 pm

Salt bridges help with electron flow and neutralizing the solutions in a galvanic cell.

ramiro_romero
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Re: salt bridge

Postby ramiro_romero » Fri Mar 13, 2020 1:40 pm

A sat bridge is usually comprised by a strong electrolyte which is further made up of ions. This salt bridge allows for the neutralization and flow of electrons between a cathode and anode solution. Without a proper salt bridge, the cathode solution will become negatively charged while the anode solution would become positively charged.


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