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Actually it is both at the same time:

weakly acidic in fully protonated (compound formula H+PPT), no color, pH < 8

and

weakly base when deprotonated (PPT), with blue-purple color at pH > 8 - 10

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14y ago

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Related Questions

What is the colour of phenolphthalein indicators in acidic and basic properties?

In acid conditions it is colorless and in basic conditions it is pink and then bright red


is phenolphthalein clear in acid?

No, phenolphthalein is colorless in acidic solutions. It turns pink or red in basic solutions.


When phenolphthalein is added to ammonium hydroxide is the color of the final solution is pink?

Phenolphthalein is an indicator often used in chemical titrations. Phenolphthalein is colorless in acidic solutions and turns pink in basic solutions. The more basic the solution the pinker the solution will become when Phenolphthalein is present.


Why we use phenopthline as indicator for determining theconcentration of oh?

Phenolphthalein change the color from pink in basic solutions to colorless in acidic solutions.


Does phenolphthalein indicator remain clear in a acid?

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What is the color of phenolpthalein in?

Phenolphthalein is colorless in acidic solutions and pink in basic solutions.


What happens when phenolphthalein mixes with saliva?

Phenolphthalein is a pH indicator that turns pink in basic solutions, and colorless in acidic solutions. Normal pH of saliva ranges between 6.2 (acidic) and 7.4 (basic), with 7 being neutral pH. So, the answer is, "it depends." Is the saliva acidic, or basic?


Why phenolphthalein get colour on basic medium?

Phenolphthalein is colorless in acidic solutions but turns pink or purple in basic solutions because the hydroxide ions in the basic medium react with phenolphthalein to form a pink-colored compound. This color change is due to a shift in the chemical structure of phenolphthalein when exposed to a basic environment.


What would happen if you added phenolphthalein to sodium hydroxide?

Phenolphthalein is a pH indicator that turns pink in basic solutions. When added to sodium hydroxide, which is a strong base, the phenolphthalein will turn pink to indicate that the solution is basic.


What color does phenolphthalein turn in base?

if concentration is particularly strong then it became purple


Do bases turn phenolphthalein pink?

Yes, bases turn phenolphthalein pink because phenolphthalein is colorless in acidic solutions but turns pink in basic solutions with a pH around 8.2 to 10.


What is the colour of phenolphthalein after addition of dilute HCl?

The color of phenolphthalein after the addition of dilute HCl is colorless. Phenolphthalein is typically pink in basic solutions but turns colorless in acidic conditions due to the change in pH.