Talk:Chemical change

Untitled

I know Mlbbaseball! —Preceding unsigned comment added by Mlbbaseball96 (talk • contribs) 05:19, 17 January 2009 (UTC)

Stub status

I suggest that this page be given a stub statis. . . Ryuugaki 23:28, 24 January 2007 (UTC)

I have posted a "stub" statis on this page. If you feel that this page deserves to be free of it, go ahead and take it off. However, it looked way too small to qualify as a full-length article. And to whoever wrote that comment down there, it helps if you leave some sort of a name. Ryuugaki 23:31, 24 January 2007 (UTC)

Bubble bath

blah

--- does Bubble bath go through a chemical change? Is this because the liquid bubble bath changes to bubbles that is a chemical change because of the water changing the liquid to foam?

No - the detergent just alters the surface tension of the water detergent mixture.  Velella  ^{Velella Talk}   20:36, 23 November 2011 (UTC)

What are some other examples of chemical change? please answer.(no name)

Whoever wrote/edited this article LOVES burning wood! That example is overused and has become redundant. --Xali (talk) 03:02, 2 February 2009 (UTC)

Dissolution of salt.

When NaCl dissolves in water, it dissociates into Na+ and Cl- ions. Clearly this is a chemical reaction.

Frankly, I think this chemical change/physical change discussion we have in grade 9 science is more confusing than helpful. You never hear physicists and chemists arguing over whether a change is physical or chemical. It has become a tradition to teach the concept, but I would love to dispense with it. Ronstew (talk) 18:13, 8 February 2008 (UTC)

CHEMiCAL CHANGE is change in the composition of matter produces a new substance —Preceding unsigned comment added by 112.200.212.124 (talk) 15:00, 20 November 2009 (UTC)

Reversibility

I have removed the part about chemical changes being irreversible... They are NOT irreversible. For example, separating water into hydrogen and oxygen is a chemical change. Burning the hydrogen (reacting it with oxygen) makes water again. — Preceding unsigned comment added by Xtfcr7 (talk • contribs) 00:43, 20 October 2011 (UTC)

But you removed three statements, not one. I've put them back, and all the text needed was a minor tweak to keep it in, not deletion.  Ronhjones  ^(Talk) 22:31, 20 October 2011 (UTC)

Re-working of article

I have substantially revised the article to try and make it make some sense. I am strongly minded to agree with Ronstew above that the distinction that this article seeks to make is something of an artifice but whilst this page survives, it might as well be as accurate as possible. If anyone would wish to substantially change or re-structure this, please be my guest - as long as the science remains sound.  Velella  ^{Velella Talk}   20:34, 23 November 2011 (UTC)

Merge into chemical reaction

Merge into chemical reaction ? V8rik (talk) 11:28, 7 February 2015 (UTC)

is all chemical reaction is a chemical change? or all chemical change is a chemical reaction. I think we can create a chemical reaction and cant create a new chemical change. Also two or more reactants are needed for a chemical reaction and no reactants remain in products except catalysts but in the case of a chemica l change this is not mandatory. So against the merge request. --Ranjithsiji (talk) 12:12, 9 February 2015 (UTC)

I have some sympathy with this proposal, but having carefully read both articles I believe that theybothserve different purposes an I therefore oppose the proposal. Chemical change is akin to such articles as Outline of water and provodes a not too technical introduction. Chemical reaction is far to technical even in its opening paragraph for thevast majoity of readers I would suspect.  Velella  ^{Velella Talk}   00:39, 21 February 2015 (UTC)

I also oppose the merger. They need a slightly more technical and a slightly less technical treatment of overlapping subject matter: people can be expected to look for different information. At least in the US, "physical change" versus "chemical change" is jargon from elementary and junior-high science classes. As I understand it, "chemical change" refers to changes in a whole material, usually a mixture, that include at least one chemical reaction. When you bake a cake, there's a chemical reaction of the acid and the NaHCO3 in the baking powder, but the whole process is described as a "chemical change". --Dan Wylie-Sears 2 (talk) 20:50, 10 March 2017 (UTC)

Looks like a consensus for no merge, so I've removed the one remaining template. Klbrain (talk) 12:00, 9 August 2017 (UTC)

Semi-protected edit request on 4 May 2018

130.117.91.49 (talk) 08:39, 4 May 2018 (UTC)

chemical changes are a compleate waste of time

 Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. — IVORK _Discuss 08:53, 4 May 2018 (UTC)

Semi-protected edit request on 24 March 2019

117.98.192.243 (talk) 05:18, 24 March 2019 (UTC)

 Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. Danski454 (talk) 17:07, 24 March 2019 (UTC)

Proposed merge of Chemical change into Chemical reaction

A chemical reaction and a chemical change is the same thing. Since chemical change has very small amount of content, merging it with chemical reaction won't put undue weight (WP:UNDUE) or overload the target article, but any redundancy in text should be reduced as much as possible per WP: REDUNDANCY. — CrafterNova ^{[ TALK ] [ CONT ]} 07:27, 12 May 2023 (UTC)

I agree. Chemical reaction is the usual term. Dirac66 (talk) 02:11, 1 July 2023 (UTC)