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Silviamar: How does soap clean? |
Category: Science for everybody 16 comments
17 Jul 2005 @ 09:54 by jstarrs : I'll never look at a bar of soap... 17 Jul 2005 @ 10:37 by gea : I positively love that explanation! Silvia, this made my day, truly! Makes you look at things, at a simple bar of soap, in a totally new way! (I´ll be waiting to read more of this stuff, I bet you have more of it!) *grin* 17 Jul 2005 @ 11:39 by silviamar : :-) Jeff, exactly! I see that you got the picture! :-) Gea, sure I have more stuff hehe. It's a pity that at school we were not taught Chemistry in a more practical way, formulas and reactions can be very boring for students. 18 Jul 2005 @ 06:04 by jazzolog : We Have A Poet To Teach Us Chemistry No wonder I'm finally interested in learning this stuff. So, I have 2 questions: 1) Why does chemistry class smell so bad? 2) Who was the first human to discover soap? 18 Jul 2005 @ 08:42 by silviamar : to be a poet, to be a chemist... that is the question! :-) Jazzolog,the first question is easy to answer. The chem class smell so bad of course because most of the chemical compounds smell pretty bad and people forget to use the extracting hoods when opening the bottles :-) The worst ones are those very volatile. Hydrocarbons (compounds with carbon-carbon and carbon-hydrogen bonds) smell horrible, as well as the sulfured derivatives, which for example are responsible for the bad breath. When the receptors in our nose receive the impact of the molecules of these compounds, they send an unpleasant stimulus to the brain. Some others, as many esthers, smell pretty good and they are part of many fragances and perfumes. The second question is more difficult, as nobody really knows the answer. Regarding the origin of soap, there is a legend. It's said that it was discovered by chance in Rome after a heavy rain fall on the slopes of Mount Sapo, the water mixed with the animal fat and ashes around an important sacrificial altar, and then people observed that the mixture was useful to wash skin and clothing. But I think that there is documented use of soap as far back as 2500 B.C. The earliest known evidence of soap use are Babylonian clay cylinders dating from 2800 BC containing a soap-like substance. Questions are always welcomed :-) 10 Aug 2005 @ 17:39 by konchock : LINDO JABONCITO Hola Silviamar, interesante y simple explicacion, nunca se me ocurrió pensar por que el jabon limpia, ahora gracias a ti lo se. Lamento que la enorme mayoria de los participantes de esta red sean de habla inglesa, me cuesta mucho ya que en principio he sido un aotudidacta en idiomas y otras cosas. Bueno, un dia de estos te mando un mensaje presentandome, soy de santiago de chile y mi nombre es moris. gracias y hasta pronto 11 Aug 2005 @ 07:45 by silviamar : gracias konchock Me alegro de que te haya gustado el artículo, trato de que la gente entienda que la quimica es muy util en nuestra vida y que está en todas partes :-). Mándame el mensaje cuando quieras, encantada de conocerte. Había pensado en poner un apartado en mi newslog con los artículos que pongo traducidos al español, pero todavía no sé si sería una buena idea... Un saludo desde España. 11 Aug 2005 @ 11:11 by Frank Johnson @59.95.153.20 : Other Good Service 4 Sep 2005 @ 18:37 by Kelly @4.152.144.56 : Thanks so much I've been looking for a simplified way to explain this concept to my middle school students (not being sure myself how soap works).I grealty appreciate your simplicity. 4 Sep 2005 @ 20:38 by silviamar : I'm glad to hear that this little article has been useful for somebody! When I have some time, I'll post more :-) 21 Jan 2007 @ 11:11 by Parminder Singh @74.111.46.38 : Helpful This website and article are very helpful. I was looking for something like this for a long time and I finally found this site. This site helped me out alot for my scince fair project. Thank-you so much and the article is so understandable!!!!!!!!!!!! ******* Hello! I'm glad that this article has been helpful for you! Thanks for your message. I like to bring science to everybody, so we all can understand better the world where we live :-) 23 Apr 2007 @ 02:42 by bb @218.111.177.194 : thx TQ.. i need to understand my organic chemistry (II), "lipids". i am comfuse about 'micellas' & 'emulsion'.... 17 Aug 2007 @ 07:49 by Jay Dee @155.238.8.15 : Esthers I have read about the topic, but i don't really follow the saponofication part of the chapter! I know that they have nice smells and the have sumthing to do with extraction of fat! 11 Dec 2007 @ 20:55 by casey thomas @66.210.57.9 : jkfjd this is very nice 11 Dec 2007 @ 21:01 by casey thomas @66.210.57.9 : jkfjd casey is a total duoch 21 Jan 2008 @ 20:56 by grace Griffin @74.36.109.4 : wow wow that is sooo cool now i want to find out more Other entries in Science for everybody 4 Feb 2006 @ 14:42: Lactose intolerance 20 Nov 2005 @ 11:29: Why do onions make you cry? 16 Oct 2005 @ 17:02: Vegetables, chemistry and colour
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17 Jul 2005 @ 09:27, by Silvia Martínez