Assuming I had a black liquid, how would I preform a titration? Is there a special indicator I could use? is it possible?You don't need to tell me the steps of a titration, just how I would detect the indicator.
What a lot of confusion over a welll known and simple indicator such as phenolphthalein. This indicator is a bright pink in basic conditions that is pH > 8.3, In solutions with pH < 8.3, the solution is colourless even in very acidic conditions. I do not know that this indicator ever turns green or orange. But to answer the question. There are many occasions when an acid/base titration has to be carried out in very dark liquids. In these cases indicators are of no value at all, The only way of doing this is to do the titration using a pH meter.When doing a strong base/strong acid titration there is a very rapid change in pH from >8.5 to <5.0 by the addition of a drop of acid. The end point is therefore very easily determined.
I wonder if placing a bright light source under or behind your beaker of black solution would help you to be able to see the indicator. Not sure what indicator you could use, but its worth a try with the light I think. Dr. Chem I think you might be mistaken. Phenolphtalein will turn pink under basic conditions and orange under acidic conditions. It is colorless when neutral. Feel free to correct me if I am wrong.
I've been doing a lot of titration lately with Phenolphthalein which will turn out green color at your final point I believe, but using a black liquid I wouldn't know. I like the other idea with the light.
