Talk:Solubility: Difference between revisions

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I have improved the Soluble article to discuss solubility. That article also contains links to solute, solvent, and solution. H Padleckas 22:34, 6 Apr 2005 (UTC)

i dont think so

What is the MOST soluble substance?

From the chart in the article, one could argue that NaCl (Common Table Salt) would be more soluble than Sucrose (Table Sugar) because of the fact that NaCl is ionically bonded and above the polar covalent bonds found in sucrose. However, many people seem to believe that the solubility of sucrose is greater than that of Sodium Chloride. Who is right? Is Sucrose more soluble, or is Sodium Chloride? 24.11.91.3 15:33, 3 April 2006 (UTC)[reply]

I don't think that the chart is necessarily meant to imply that ionic compounds are always more soluble than polar covalent compounds, especially becasue the "metallic" bonding type is listed above polar covalent; most polar covalently bonded compounds are more soluble than metals. Natsirtguy 19:54, 4 October 2006 (UTC)[reply]

Just an added note...your iron example is kind of confusing since iron can be soluble through siderophores, I don't know if that would matter too much since that is an exception

solubility

why the solubility increase when the temperature increase

Sometimes it does; sometimes it doesn't. --Smack (talk) 19:28, 29 December 2006 (UTC)[reply]

physical or chemical property?

I'm not sure, but couldn't solubility also be considered a physical property? -tcwd 23:23, 1 October 2006 (UTC)[reply]

What are you refering to? Why is this relevant? JKW 21:42, 2 October 2006 (UTC)[reply]

I think he's talking about the categories down the bottom, and feels that it should be added to the physical properties category also. Aquain (Non member) 06:05, 25 November 2006 (UTC)

He does have a point. Solubility is how much solute can dissolve in a solvent. Dissolvation is a physical property, so why not solubility? 17:08, 9 December 2006 (UTC)

Merge

okay, this page needs to be edited for sure, someone wrote " a solution at equilibrium that can kiss my butt" ^^^ LOL well..its changed for a while now...right?[BR] Well...are we gonna amerge Solid Solubility to this article? I'm not sure we should...we should just have a link to link to that article Invader05 00:34, 29 December 2006 (UTC)[reply]

I'm not sure either. Does the term "solubility" usually include solid solutions? --Smack (talk) 19:28, 29 December 2006 (UTC)[reply]

I noticed the absense of gas/gas solutions too. Maybe a mention of the atmosphere? — Preceding unsigned comment added by 208.201.160.2 (talk • contribs)

The situation of gases could be explained similarly using the words already written. It's just a matter of examples. --Der yck C. 06:47, 27 January 2007 (UTC)[reply]

Chemistry Collaboration of the Month

Moved from Wikipedia_talk:Chemistry_Collaboration_of_the_Month I tried to wade in to improve this article as the CCotM. It's quite a staggering task to perfect this article. I'd like to talk about it here before I do any damage, though. IMHO, a lot of the information simply doesn't belong in this article. Rather, they should be in the relevant related articles, such as solution, solvent, etc. Solubility should not attempt to encompass everything to do with this. Perhaps it should limit itself to

Definition (do we refer to the property of simply being able to dissolve, or the stricter definition (IUPAC) of the maximum amount of stuff which will dissolve?)
What determines a substance's solubility (briefly, main article being solution), including a passing mention of factors such as temperature and/or pressure (for the case of gases)
Applications of solubility in chemical processes, and everyday life e.g. making milk from powdered milk

Comments please! --Rifleman 82 16:52, 2 January 2007 (UTC)[reply]

Yes, it's a challenging article, but a very important one. I think we need to address all of the above, and more. IMHO, we should address both definitions of the term, as given here. By the way, you might be interested to know the history of this page - it used to be called Soluble and was only changed a year ago. I suspect a lot remains to be cleaned up from that, though solubility is a much better title IMHO. I'd also like to reiterate my comments on the main page - we need to consider the related articles solvent and solution - that means not duplicating (or triplicating) a lot of information. As for other topics, I'd like to see a discussion of factors that make something soluble (or not), such as polarity and lattice energy. Should we move this discussion to Talk:Solubility to bring in a broader set of opinions? Walkerma 06:37, 3 January 2007 (UTC)[reply]

I did a rewrite of much of the text, and added a more general chart showing solubility curves for a variety of salts - not just Na2SO4. I had trouble getting Excel to draw these curves, so I had to fill in the gaps with coloured pencil! Excel also won't let you have subscripts in the chemical formulae (even though my table had them). My poor artistic skills aren't too obvious unless you click on the image or look quite closely, but if anyone has better graphing software than Excel (or knows how to use Excel more effectively?), perhaps you could let me know and we could improve it. Another thing, I wanted to cover polarity under the "factors affecting solubility" since I thought it relevant, but then I found a section on organic compounds later on that sort-of covered much of the same topic. I tried to rewrite both to limit any duplication, but I'd appreciate a second pair of eyes on this. Maybe it's OK, but if not, feel free to consolidate if you think there is too much duplication. Thanks, Walkerma 07:14, 28 January 2007 (UTC)[reply]

I managed to find out how to do this, so I cleaned it up. I may try to improve it more later. Walkerma 02:35, 17 February 2007 (UTC)[reply]

Solubility chart

The chart seems to put soluble and insoluble substances side by side. Not being a comparison chart, imo that's not a good presentation. An alternative chart puts the group of substances on either the soluble or insoluble side, and lists the exception on the other side. --Der yck C. 13:49, 17 January 2007 (UTC)[reply]

Wrong Information

hydroxides and oxides (except Group I, NH4+, Ba2+, Sr2+, Ca2+ and Tl+) Where CaO will react with water to form CaOH2 Solubility: 0.185g/100 cm³ Ksp = 4.68 × 10−6 That is misleading people that CaOH2 is soluble. I think we should change that.