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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: cvn on April 16, 2006, 04:26:35 AM

Title: Screened Methyl Orange
Post by: cvn on April 16, 2006, 04:26:35 AM

Can anyone tell me the chemical forumla of screened methyl orange?

Title: Re: Screened Methyl Orange
Post by: xiankai on April 17, 2006, 08:05:47 AM

http://en.wikipedia.org/wiki/Methyl_orange

its formula name is a mouthful

Title: Re: Screened Methyl Orange
Post by: cvn on April 20, 2006, 05:51:13 AM

thanks for that wiki site..
but what i am asking for is Screened Methyl Orange which has a different formula as the one you had given me..

Title: Re: Screened Methyl Orange
Post by: Borek on April 20, 2006, 06:17:15 AM

Have you heard about Google? First hit when you search for screened methyl orange is "What is the difference methyl orange and screened methyl orange?" and it contains ALL the information you may need.

Title: Re: Screened Methyl Orange
Post by: cvn on April 20, 2006, 06:57:14 AM

yes i read Google search results..
it says this: Screened methyl orange is a mixture of methyl orange and xylene cyanole FF (a redox indicator), 40:56. It changes colour at pH 3.8 -- 4.1 from violet to green.

but adding xylene cyanole FF doesnt change the chemical formula ?  :-\

Title: Re: Screened Methyl Orange
Post by: cvn on April 20, 2006, 07:11:47 AM

alright, so i guess i get the formula of methyl orange, and the formula of xylene cyanol

a mixture, so formula: C25H26N2O6S2 + C14H14N3O3SNa

Title: Re: Screened Methyl Orange
Post by: AWK on April 20, 2006, 08:52:19 AM

Note, we do not use formulas for mixtures. Eventually, you can write down it in analogous way as for example Na2SO4.10H2O, but at least one of coefficient will be a real number.