Wikipedia:Featured picture candidates/Membrane cell for chloralkali production

Membrane cell for NaOH/Cl2 production
Voting period ends on 10 Jan 2012 at 06:26:39 (UTC)




 * Reason:Complicated diagram to support a discussion with a lot of chemical equations and mass transfer and charge balance. Huge industry (important article).  Support work on chlorine
 * Articles in which this image appears:Chloralkali process, Chlorine, Chlorine production
 * FP category for this image:Wikipedia:Featured pictures/Sciences/Materials science
 * Creator:Jkwchui


 * Support as nominator --TCO (Reviews needed) 06:26, 1 January 2012 (UTC)
 * Support as creator -- Add that the content is scientifically accurate (the guy who made this is a chemist working with membrane processes). I think illustrations and diagrams are generally under-featured in FP, and would be a good change-of-pace from the normal photographic images. Jon C (talk) 07:45, 1 January 2012 (UTC)
 * Comment Needs sources/references on the image page. JJ Harrison (talk) 11:51, 1 January 2012 (UTC) ✅ Jon C (talk) 13:30, 1 January 2012 (UTC)
 * Why does the sourcing end with an "and"? Is there something still to be added? --jjron (talk) 14:50, 5 January 2012 (UTC)
 * Fixed Jon C (talk) 04:06, 9 January 2012 (UTC)


 * Comment I think this diagram could be clearer in a couple of scientific aspects:
 * It is not clear where the sodium counterion to chlorine on the left side of the cell is deposited/lost to/etc. I assume it is deposited onto the electrode?
 * The role of the positive and negative electrodes is not clear either either, i.e. how are electrons involved?
 * The drawing quality is certainly FP standard but I think these points need to be cleared up to make this picture have suitable accuracy and EV. - Zephyris Talk 23:46, 2 January 2012 (UTC)
 * Na ---> NaOH in bottom right corner. 75.41.110.200 (talk) 16:54, 3 January 2012 (UTC)
 * Ah, yeah, didn't spot that. Unfortunately that kinda supports my point; I love the diagram but think it could be just a little bit clearer! - Zephyris Talk 12:05, 4 January 2012 (UTC)
 * The sodium cation does not participate in the oxidation - it shuffles to the net partner, and in a cascading chain completes the circle on the reduction end. Unfortunately this is not something that a single image can convey without text supplements.  Likewise with the electrons - to fully show the providence and end of the electrons, the entire battery would need to be showed explicitly, and I think that would lead to more complication than the articles need at this point.  Jon C (talk) 04:06, 9 January 2012 (UTC)


 * Support Seems clear to this engineer that didn't like either chemistry class he had to take in college. Image quality is great; wish there were more like it.  upstate NYer  05:05, 5 January 2012 (UTC)
 * Support as above. I'm not a scientist, but I appreciate the importance of these kinds of diagrams. They certainly have a place in our FP galleries. J Milburn (talk) 23:19, 6 January 2012 (UTC)
 * Weak Support. Fairly plain, but I guess that's what you want. Assuming it's accurate, and I haven't seen anything to say it isn't, the actual diagram elements seem good - clear, consistent, correct symbols, etc. The only major gripe I have is that the A, B, and C are not defined in the Legend; yes, they are in the file description, but neither the legend nor the caption in the article defines them. If this becomes separated from the image page, or if someone doesn't know to click through, that is potentially confusing. Note that my question above on the sourcing is also yet to be acted on. Switch to full support if these things are adequately addressed. --jjron (talk) 03:57, 7 January 2012 (UTC)
 * Added description to the caption of the article. Jon C (talk) 04:06, 9 January 2012 (UTC)


 * Comment The legend and ion graphics are too small to be deciphered in all of these articles. Either the legend and ion graphics should be made bigger, or the image should be bigger. Otherwise the graphic is not actual useful within the articles. Kaldari (talk) 06:24, 8 January 2012 (UTC)
 * The image is a SVG, and can be scaled to any size as necessary. I embedded them in the article at this size because they read right on my screen -- I can see if that at different resolutions it may not work as well.  Speaking of which - is there an option to dynamically scale the graphics within an article to full browser width, so we're not making it too big for device-browsing, and too small for high-resolution displays? Jon C (talk) 04:06, 9 January 2012 (UTC)


 * Comment One thing that isn't made immediately clear to me. There is a H2O input on the right, but presumably water flows through the other input and outputs? If that is the case then surely we ought to put a water molecule or two in those pipes to make it clearer? JJ Harrison (talk) 23:23, 8 January 2012 (UTC)
 * Good point - I'll make that change. Thanks to all of you for thoughtful responses - this exercise, I felt, have made the diagram and associated pieces better in ways that I simply haven't thought of at first place.  Apologies for some tardy responses - this isn't one of the pages I frequent on Wiki. Jon C (talk) 04:06, 9 January 2012 (UTC)
 * Might also help to indicate that blue background means liquid, and possibly that white might indicate gas (may pay to change the gas colour to something distinguishable to background) JJ Harrison (talk) 04:49, 9 January 2012 (UTC)


 * Support JJ Harrison (talk) 21:32, 9 January 2012 (UTC)

--Papa Lima Whiskey 2 (talk) 12:48, 10 January 2012 (UTC)