The_simpsons Posted December 8, 2005 Share Posted December 8, 2005 im not sure what it is called in english, but the swedish short name for it is BTB, and maybe its the same in english, its a yellow-red liquid, that indicates pH, if you add to a acidic solution it turns yellow-red, if its added to a neutral solution it becomes green or if you add it to a alkaline solution it becomes blue. my question is, how is the chemical structure of the chemical, and what makes it change colour depending on acidic, neutral or alkaline solutions? Link to comment Share on other sites More sharing options...
raivo Posted December 8, 2005 Share Posted December 8, 2005 This is Bromothymol Blue. Link to comment Share on other sites More sharing options...
ecoli Posted December 8, 2005 Share Posted December 8, 2005 http://en.wikipedia.org/wiki/Bromothymol_blue Link to comment Share on other sites More sharing options...
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