Do we need salt bridges in Electrolytic cells?

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Discussion Overview

The discussion centers on the necessity of salt bridges in electrolytic cells, exploring the role they play in charge neutralization and circuit closure. Participants compare this with galvanic cells, questioning the absence of salt bridges in educational representations of electrolytic cells.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant argues that salt bridges are necessary in electrolytic cells to neutralize charges and prevent the potential difference from increasing excessively.
  • Another participant suggests considering the concept of closing the circuit in relation to the function of salt bridges.
  • A later reply seeks clarification on whether the salt bridge contributes to closing the circuit in electrolytic cells.
  • One participant confirms the role of the salt bridge in closing the circuit.
  • A suggestion is made to draw full circuit diagrams for both electrolytic and galvanic cells to illustrate the current paths.

Areas of Agreement / Disagreement

Participants express differing views on the necessity and function of salt bridges in electrolytic cells, indicating that the discussion remains unresolved.

Contextual Notes

There are assumptions regarding the definitions and roles of salt bridges in different types of electrochemical cells that remain unaddressed.

jaumzaum
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I was wondering if we really need salt bridges when doing Electrolysis. I would answer yes, because we need to neutralize the charges in both sides, or the potential difference of the Electrolytic cell will keep increasing until the generator that is connected to it is not able to supply any current. But why all the pictures in the didactic chemistry books I read make sure they put a salt bridge or a membrane in a Galvanic Cell, but they never put it in a Electrolytic cell? Is it not necessary? If so, why?
 
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Think in terms of closing the circuit.
 
Borek said:
Think in terms of closing the circuit.
Sorry, I didn't get what you mean. The salt bridge would actually help to "close" the circuit, wouldn't it?
 
Yes.

Draw a full circuit (cell and all surrounding elements) containing an electrolytic cell and a a full circuit with a galvanic cell. Try to mark a closed current path for each circuit.
 

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