Salt Bridge: Maintaining Charge Flow in External Circuits

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Discussion Overview

The discussion revolves around the role of a salt bridge in electrochemical cells, specifically addressing how charge flow is maintained in external circuits with and without a salt bridge. Participants explore the implications of charge accumulation in half cells and the resulting electron flow, focusing on conceptual understanding rather than practical applications or homework problems.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant asserts that without a salt bridge, there would be no flow of charge or electrons in the external circuit, but questions whether there could still be some electron flow until charge accumulation occurs.
  • Another participant emphasizes the importance of the salt bridge in maintaining neutrality and suggests that charge accumulation would eventually prevent further electron flow.
  • A later reply challenges the assumption that the discussion is not a homework problem, questioning the clarity of this distinction among participants.
  • One participant proposes estimating the rate of charge accumulation and calculating the potential changes and forces involved, suggesting a more analytical approach to the problem.

Areas of Agreement / Disagreement

Participants express differing views on the flow of electrons without a salt bridge and whether the discussion is related to homework. There is no consensus on these points, indicating ongoing debate.

Contextual Notes

Some assumptions regarding the time it takes for charge accumulation and the conditions under which electron flow occurs are not fully explored. The discussion also reflects varying interpretations of emphasis in communication.

Who May Find This Useful

Individuals interested in electrochemistry, particularly those exploring the theoretical aspects of charge flow and the role of salt bridges in electrochemical cells.

gracy
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Without the salt bridge then there is no flow of charge and there are no electrons flowing in the external circuit.?HOW?i know function of salt bridge is only to maintain neutrality i.e if salt bridge is not there there will be accumulation of positive charge in one half cell and negative charge in another half cell and this will prevent further flow of electron but till the +ive and -ive charges are not accumulated ,AS IT TAKES TIME electrons will flow SO THERE WILL BE FLOW OF ELECTRON EVEN WITHOUT SALT BRIDGE TO SOME EXTENT i.e UNTIL CHARGES DO NOT START ACCUMULATION RIGHT?
 
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gracy said:
Without the salt bridge then there is no flow of charge and there are no electrons flowing in the external circuit.?HOW?i know function of salt bridge is only to maintain neutrality i.e if salt bridge is not there there will be accumulation of positive charge in one half cell and negative charge in another half cell and this will prevent further flow of electron but till the +ive and -ive charges are not accumulated ,AS IT TAKES TIME electrons will flow SO THERE WILL BE FLOW OF ELECTRON EVEN WITHOUT SALT BRIDGE TO SOME EXTENT i.e UNTIL CHARGES DO NOT START ACCUMULATION RIGHT?
No need to scream. Is this a homework problem?
 
Evo said:
No need to scream. Is this a homework problem?
i am not screaming at all i just wanted to emphasize it's importance.obviously it is not my homework problem it is conceptual doubt.
 
gracy said:
i am not screaming at all i just wanted to emphasize it's importance.obviously it is not my homework problem it is conceptual doubt.
Why do you think it should be obvious to anyone but you that this is not a homework problem?

When you bold a word or two here and there, it's emphasis. When you bold whole sentences, it's screaming.
 
Try to estimate how fast the charge accumulates. Try to calculate how fast the potential changes with charge accumulation (simplest way to do so would be to assume your system is just a capacitor). Try to calculate what forces are involved for accumulated charges.
 
phinds said:
Why do you think it should be obvious to anyone but you that this is not a homework problem?

When you bold a word or two here and there, it's emphasis. When you bold whole sentences, it's screaming.
sorry i also think it is not obvious that this is not a homework problem.
 

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