phenolphthalein

My question has to do with the preparation of the phenolphthalein indicator.

This means that they will turn phenolphthalein from colorless to pink.

Phenolphthalein changes color over a range of pH values between 8 and 10.

You might repeat the lab using universal indicator in place of phenolphthalein.

So, eventually the pink phenolphthalein color will fade, but this is a much slower process.

Be careful to handle the phenolphthalein under your teacher's directions, since it is poisonous.

However, phenolphthalein is an indicator that responds to changes in pH.

I cannot think of any simple way to make phenolphthalein change color with a change in humidity alone.

The agency said there were more than two dozen laxatives that did not contain phenolphthalein.

But phenolphthalein's pink endpoint is actually at a pretty high pH.

Bisacodyl was included in the move because it is chemically related to phenolphthalein.

When a 1% phenolphthalein solution is applied to normal concrete it will turn bright pink.

You can find more details by looking up phenolphthalein in the "Merck Index".

Put a few drops of one in the water (with the phenolphthalein in the water).

Proceed with caution - remember, phenolphthalein in toxic if handled improperly.

I'm also rethinking using phenolphthalein as an indicator.

Bromophenol blue is structurally related to phenolphthalein (a popular indicator).

It is closely related to bisacodyl, sodium picosulfate, and phenolphthalein.

Replies: Emma, A phenolphthalein (indicator) solution is clear as water.

But the phenolphthalein solutions I've seen were pretty faint pink, and might be even fainter in a little streak on paper.

You can add a teaspoon of acid to the water and just a few drops of the phenolphthalein to make a clear solution.

If you tell a computer to add two drops of phenolphthalein indicator to a flask, it does not err.

(Since when is phenolphthalein the forensic equivalent of duct tape?)

The remaining alkali is filtrated against standard acid using phenolphthalein as indicator.

It is pushing things to expect sodium acetate to reliably deprotonate phenolphthalein.