r/chemistry•
limitz

Designing a simple "magic pitcher" experiment. Need some help.

I'd like to use two acid-base indicators to carry out a magic-pitcher experiment in a single beaker, and 5 steps.

The 5-steps I have are:

  1. Fill a beaker with an acid

2) Add 1st acidic indicator. Color change

3) Add some base. Turn it back to clear

  1. Add Phenolphthalein. Turn it to fuschia.

  2. Add more base. Turn it back to clear.

In general, I'm finding it difficult to find an acid-base indicator that turns color, but turns back to colorless with increasing pH. I've looked at a lot of acid-indicators, but from my readings, haven't found one that changes back to clear.

Does one exist?

Posted Feb 21, 2016, 9:39 PM UTC

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