Phenolphthalein Indicator - Science Notes and Projects
2022年1月19日 · Phenolphthalein pH Range and Colors. The two main colors of phenolphthalein are colorless and fuchsia, which is a pink-purple-red color, depending on the indicator …
Phenolphthalein - Wikipedia
Phenolphthalein (/ fɛˈnɒl (f) θəliːn / [citation needed] feh-NOL (F)-thə-leen) is a chemical compound with the formula C 20 H 14 O 4 and is often written as " HIn ", " HPh ", " phph " or …
pH Indicator Chart – Colors and Ranges - Science Notes and ...
2020年9月10日 · If you use phenolphthalein, you expect a pink/red color to vanish below a pH value of 8.0. You titrate until the solution becomes colorless because that is as close to the …
Phenolphthalein | pH indicator, acid-base titration ...
2024年11月7日 · Phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution’s pH, …
14.9: Indicators - Chemistry LibreTexts
2023年7月18日 · A typical indicator for acid-base titrations is phenolphthalein, HC 20 H 13 O 4. Phenolphthalein, whose structure is shown below, is a colorless weak acid (K a = 3 × 10 –10 …
Phenolphthalein: Structure, Properties, pH Indicator and Uses ...
2024年2月6日 · What is pH Range of Phenolphthalein? Phenolphthalein has a pH range of approximately 8.2 to 10.0, making it suitable for indicating the endpoint of titrations involving …
17.3: Acid-Base Indicators - Chemistry LibreTexts
2023年7月12日 · In more basic solutions where the hydronium ion concentration is less than 5.0 × 10 −9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used …