Talk:Salt bridge
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Too many wrong contents here
[edit]No offence but to be clear I must say that there are too many mistakes here .
Salt bridge is not barely for connecting two half-cells, the importance of which is it decreases the liquid junction potential . So KCl is often used here for the rates of moving for the ions are close enough for regular analytical jobs. But according to what I have learnt from university, NaCl is not OK!
Electrons can not exist in solutions like water or acid or alcohol. Anions (e.g. chloride) are carrying the negative charge in solution.
Isolating a very kind of metallic cation is not an advantage of salt bridge. It is an advantage of tri-electrode system .So I advise to delete the paragraph of isolation.
And why I do not edit the content ? I am a Chinese native speaker .I can read English well but compose poorly .Some English native speaker should do the editor's work . The Chinese version was based on the article here and I have correct it . Zhaiyu.zhaiyu (talk) 23:26, 14 June 2014 (UTC)
Salt bridge composition
[edit]Although the single salt bridges described here are probably adequate in many cases (probably even NaCl for some purposes) I presume that the composition mentioned in the article on Liquid junction potential, using a solution saturated with KCl and NH4NO3 with some (how much?) Li-acetate corresponds to some kind of optimised composition.150.227.15.253 (talk) 09:17, 20 May 2020 (UTC)
Durability of salt bridges
[edit]Although needed in many cases I expect salt bridges to suffer from more or less severe disadvantages due to diffusion in and out from the salt bridge and the electrolytes it is supposed to connect. The salt bridge may be replaced periodically but contamination of the other electrolytes will persist. How is this handles if for example measurements require a the use of a salt bridge over extended periods? It would be nice if somebody could treat such aspects in the article.150.227.15.253 (talk) 09:26, 20 May 2020 (UTC)
Porous plug bridges
[edit]The porous plugs often used in e.g. measurement electrodes should probably count as third type of salt bridges. 150.227.15.253 (talk) 09:50, 20 May 2020 (UTC)
- I agree here. If we accept filter paper as salt bridge. All other membranes which let ion pass but prevent bulk mixing should be counted as salt bridge. Glass frit or other ceramic membrane such as the porous plugs could be added in the article. It would still exclude ion specific membrane.
- Eitherway i think the format is wrong, salt bridge should be exclusive to the tube and should exclude any other membrane.
- A general wiki page on electrolytic membrane is still lacking. it could encompass all the different design and state the differences between them (there is alot of differences) and could also include briefly ion specific membrane. Falsht (talk) 12:41, 28 August 2022 (UTC)