Phenolphthalein is a chemical compound with the formula C20H14O4 and is
often written as ... because of the reaction with carbon dioxide. Thymolphthalein
is used for the same purpose and in the same...
The function of an indicator in a titration process is to determine the ... examples
of pH indicators are methyl orange, methyl red, phenol red and phenolphthalein.
Phenolphthalein is an organic compound used as a laboratory reagent and pH
indicator. Phenolphthalein exerts laxative effects by stimulating the intestinal ...
The easiest way is to add back some of the solution you were titrating. If
phenolphthalein remains, it will react with the solution and change back to purple
Nov 25, 2015 ... Well, you may have used phenolphthalein as the indicator in a particular titration
you ... First, what's the purpose of an acid-base indicator? Well ...
Abstract. Phenolphthalein (PHE) is the active ingredient in at least 12 over-the-
counter laxative preparations. It is alleged to have a minor effect in the small ...
Phenolphthalein is an indicator of acids (colorless) and bases (pink). Sodium
hydroxide is a base, and it was in the pitcher at the beginning, so when added to
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Dec 1, 2011 ... Phenolphthalein Structure Function Relationship ... AP Chemistry Lab 11 -
Phenolphthalein as a pH Indicator - Duration: 2:13. Ward's Science ...
Phenolphthalein is a presumptive test that reacts with the heme molecule present
in blood. A positive reaction gives a pink color. While bloodstains normally ...
Phenolphthalein is a colourless, weak acid which dissociates in water forming
pink anions. Under acidic conditions, the equilibrium is to the left,and the ...