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Why Does Phenolphthalein Change Color?
Phenolphthalein is a chemical compound composed of 20 carbon molecules, 14 hydrogen molecules and 4 oxygen molecules. It is mildly acidic and is primarily used as a pH indicator. It is also sometimes used as a laxative, though its laxative effects are... More »
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Phenolphthalein - Wikipedia

en.wikipedia.org/wiki/Phenolphthalein

Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as ... This reaction leads to the pH falling below the color change threshold as hydrogen ions are released by t...

Why does phenolphthalein change color? | Reference.com

www.reference.com/science/phenolphthalein-change-color-e65f5390badb2cba

Phenolphthalein, which is an acid-base pH indicator, is a weak acid. For this reason, this indicator is colorless in the presence of acids that are also associated ...

What does phenolphthalein changing pink indicate? | Reference.com

www.reference.com/science/phenolphthalein-changing-pink-indicate-3b463649d047b26

The addition of a base to a solution of phenolphthalein removes hydrogen ions from the solution, creating more phenolphthalein ions, which causes the color to  ...

Research the Topic - How does phenolphthalein work? Part 1

researchthetopic.wikispaces.com/How does phenolphthalein work? Part 1

Sep 30, 2011 ... Phenolphthalein has positively charged hydrogen ions. The reason phenolphthalein changes color is because although the phenolphthalein ...

Why Does Phenolphthalein Change Color? | eHow

www.ehow.com/how-does_5271431_phenolphthalein-change-color.html

About Phenolphthalein. Phenolphthalein is a mildly acidic compound that has a chemical formula of C20H14O4. It is primarily used as a pH indicator, allowing ...

Acid-Base Indicators - Chemistry Department - Elmhurst College

chemistry.elmhurst.edu/vchembook/186indicator.html

Whereas most dyes do not change color with the amount of acid or base present, there ... Phenolphthalein is an indicator of acids (colorless) and bases (pink).

Why does phenolphthalein change colour around pH 9.0 but methyl ...

www.quora.com/Why-does-phenolphthalein-change-colour-around-pH-9-0-but-methyl-orange-around-pH-5-0

Indicators are chemicals whose chemical structures experience drastic changes when concentration of protons change. Some indicators become carbocations ...

Magic Breath - Chemistry LibreTexts

chem.libretexts.org/Demonstrations_and_Experiments/Lecture_Demonstrations/Magic_Breath

Aug 29, 2016 ... Put 10 - 12 drops of phenolphthalein solution in the water. ... may have to experiment a bit with the amount so that you do not have to blow forever to get it to change colors. ... The color will start to change back to colorless.

Indicators

www.ch.ic.ac.uk/vchemlib/course/indi/

... (also known as pH indicators) are substances which change colour with pH. ... Phenolphthalein is a colourless, weak acid which dissociates in water forming ...