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In the basic form of methyl orange, a hydrogen ion is lost from the -NN- bridge between the rings, and the electrons formerly used to bind the hydrogen neutralize the positive charge on the terminal nitrogen, so that it is no longer able to pi-bond.
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antoine.frostburg.edu/chem/senese/101/features/methylor...
antoine.frostburg.edu/chem/senese/101/features/methylorange.shtml
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Methyl orange - Wikipedia, the free encyclopedia
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Methyl orange is a pH indicator frequently used in titrations. It is often chosen to be used in titrations because of its clear colour change. Because it changes colour at the pH of a mid-strength ac...
en.wikipedia.org/wiki/Methyl_orange
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Methyl Orange is an indicator that is used to indicate the equivilance point of and acid-base titration . In acidic environments, it turns red and in basic environemnts, or pH of 4.4 and higher, it turns yellow. It is prepared by treatment ...
http://wiki.answers.com/Q/What_is_methyl_orange
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Assuming that you are titrating the limewater with a strong acid, such as hydrochloric acid or nitric acid, either methyl orange or phenolphthalein can be used as an indicator here. Perhaps your teacher is trying to give you some experience of working with other indicators apart from phenolphthalein.
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www.chemistry-react.org/go/Faq/Faq_23558.html
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Ideally, one drop of liquid added from the burette causes the mixture to turn orange, i.e. an intermediate colour between the two extremes of red and yellow. ... In reality, of course, any shade of orange will do, but if we are working to very high standards we would like to have the same intensity of orange colour in...
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www.chemistry-react.org/go/print/Faq/Faq_26889.html
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fr. L. helianthes, or NL. helianthus, sunflower, in allusion to its color.] (Chem.) An artificial, orange dyestuff, analogous to tropaolin, and like it used as an indicator in alkalimetry; -- called also methyl orange. ... methyl orange n : an azo dye used as an acid-base indicator; used for titrations involving weak bases...
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www.wkonline.com/d/Methyl_orange.html
www.wkonline.com/d/Methyl_orange.html
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Orange-yellow powder used as an acid–base indicator in chemical tests, and as a stain in the preparation of slides of biological material. In solution, its colour changes with pH; below pH 3.1 it is red, above pH 4.4 it is yellow. ... methyl orange; methyl oxide; methyl p-hydroxybenzoate; methyl p-hydroxybenzoate;
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encyclopedia.farlex.com/methyl+orange
encyclopedia.farlex.com/methyl+orange
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Recipe for the preparation of Methyl orange. Methyl Orange is a commonly used indicator dye that changes color in acidic conditions from red (at pH 3.1) to orange-yellow (at pH 4.4). ... HOME > Protocols > Media and Reagents > Methyl Orange Recipe...
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www.thelabrat.com/protocols/MethylOrange.shtml
www.thelabrat.com/protocols/MethylOrange.shtml
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1. an azo dye used as an acid-base indicator; used for titrations involving weak bases
http://www.audioenglish.net/dictionary/methyl_orange.ht...
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