Chemistry, asked by vivekchaudhari9819, 1 year ago

How to insert salt bridge in electro chemical cell?

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Answered by PiyushSinghRajput1
0
A salt bridge, in electrochemistry, is a laboratory device used to connect the oxidation and reduction half-cells of a galvanic cell (voltaic cell), a type of electrochemical cell. It maintains electrical neutrality within the internal circuit, preventing the cell from rapidly running its reaction to equilibrium.
Answered by dezzire
15
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✅Salt Bridge:-

A salt bridge is a u-shaped tube plugged at each end with cotton wool that contains an aqueous solution of an ionic salt.
The salt bridge can even contain a gel material containing the ionic salt solution.

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✅Salt Bridge Added:-

When the salt bridge is added to the galvanic cell, the internal circuit disappears, because there is no net voltage between the solutions.

The instant the solution surrounding the copper bar becomes negative because it lost the positive copper ion, two positive sodium ions enter the solution from the salt bridge. The same thing happens on the other side. The instant the solution the zinc bar is in becomes positive because it lost two electrons, a negatively charge sulfate ion enters the solution.
The end results is both solutions stay neutral the electrons flowing from right to left, and the negative ions in the salt bridge flow from left to right.
The salt bridge completes the circuit.

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