Talk:Phenolphthalein

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This page is badly formatted in MSIE, and I have no idea how to correct the "colorless" bit in the box for MSIE and Opera. It works in Firefox, but the long vertical image causes problems there.. 218.102.71.159 10:47, 28 November 2005 (UTC)

There isn't any info about what pH the indicator returns back to clear in highly basic conditions (ie when the concentration of "Phenolphthalein(OH)3-" is highest). Any reason for this?


Not sure about the coding problems - it seems to show up fine in Opera 9b2 for me.

As for the pH of changing back to colorless - I did some experiments the other day and found that the maximum absorption (i.e. when the solution is the most pink) occurs around pH 12 or so. I didn't need any more accuracy than that, but at least it'll give you a starting point.

Hope this helps.

Zxian 18:29, 24 May 2006 (UTC)

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