Talk:Molar solution
From Wikipedia, the free encyclopedia
This article is looking better all the time. I removed the instructions to label with the preparer's initials -- that may be on an instruction sheet in a particular lab, but it's not encyclopedic. --Nate 22:20 Feb 12, 2003 (UTC)
[edit] Molar solution
I was just surfing the web and ran across what I think is an incorrect definition. The molarity of a solution is measured in moles per liter of solution, not per liter of water used to make the solution. In general, because the molecules of the solute add to the volume of the solution, less than one full liter of water will be required.
This article should point to concentration. Personally, I've never actually heard "a molar solution" to explicitly refer to a 1M solution. Usually it's a one/two/five/whatever molar solution of [whatever solute] in [whatever solvent], unless it's obvious what the solvent is, such as HCl. I understand what the article is trying to say but it could be very confusing to someone who isn't familar with the topic. A one molar solution is not one equivalent of molecular mass with just enough solvent added to make one liter; it's a solution where the number of moles of solute per liter of solution equals 1. That information would be better in an article on how to prepare molar solutions. I considered writing such an article, but I've read somewhere that tutorials/howtos don't belong here. I've also removed the link to percentage solution since it's just one of many ways to express concentration. --jag123 23:45, 11 Dec 2004 (UTC)
[edit] kudos
Whoever spent time editing this page, good job. A good, consise wiki entry. —The preceding unsigned comment was added by 70.134.88.55 (talk) 23:49, 5 December 2006 (UTC).
[edit] Semi-Contradiction in definition
The article on Molarity states "Such a solution may be described as 0.5 molar. This can be misinterpreted as 0.5 moles of solute per 1.0 litre of solvent, which can be true only if no volume change occurs on adding the solute to the solvent." and this Molar solution article opens with "A molar solution is one that contains one mole of solute per litre." This is a good article, but I think this needs to be clarified in this article, rather than in a sub-section of a different article. 97.82.247.200 00:56, 20 August 2007 (UTC)
