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Phenolphthalein (/ f ɛ ˈ n ɒ l (f) θ ə l iː n / [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 simply "Ph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations.
The meter reading (in millivolts) is plotted against the volume of titrant. The end point is taken at the distinct inflection of the resulting titration curve corresponding to the basic buffer solution. Color indicating titration: An appropriate pH color indicator e.g. phenolphthalein, is used. Titrant is added to the sample by means of a burette.
This differs from other modern modes of titrations, such as oxidation-reduction titrations, precipitation titrations, & complexometric titrations. [2] Although these types of titrations are also used to determine unknown amounts of substances, these substances vary from ions to metals. [2] Acid–base titration finds extensive applications in ...
An assay is a type of biological titration used to determine the concentration of a virus or bacterium. Serial dilutions are performed on a sample in a fixed ratio (such as 1:1, 1:2, 1:4, 1:8, etc.) until the last dilution does not give a positive test for the presence of the virus.
Animation of a strong acid–strong base neutralization titration (using phenolphthalein). The equivalence point is marked in red. The equivalence point is marked in red. In chemistry, neutralization or neutralisation (see spelling differences ) is a chemical reaction in which acid and a base react with an equivalent quantity of each other.
Jason Fitz, Charles Robinson & Frank Schwab look at what a path to fixing the Dallas Cowboys would look like and recap the Thursday Night Football game between the Philadelphia Eagles and ...
The No. 1 bestseller comes in 21 styles and shoppers say it's incredibly soft, just like its more expensive counterpart. "I’m shocked at the amazing quality. So silky soft with stretch.
(The Center Square) – A new Republican oversight report accuses former Congresswoman Liz Cheney of colluding with witnesses in the Jan. 6 Select Committee investigation that she oversaw.