Making Phenolphthalein (a common pH indicator)
5:01
YouTubeNileRed
Making Phenolphthalein (a common pH indicator)
In this video, phenolphthalein is synthesized by the condensation of phenol and phthalic anhydride. The phenolphthalein is separated from starting materials by several washing steps. In theory you can also just extract the phenolphthalein from the reaction mixture using NaOH solution. This will pull out the phenolphthalein as well as the phenol ...
347K viewsFeb 3, 2015
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#Kastle–Meyer test Kastle-Meyer Test Procedure
The chemical test to detect blood: a. Marquis Test b. Duquenois-Levine Test c. Kastle-Meyer Test d. Scott Test The answer is option c: the Kastle-Meyer Test. This chemical test is used to detect the presence of blood. It is performed by applying a few drops of phenolphthalein solution to the suspected bloodstain, then adding hydrogen peroxide. A pink color change indicates a positive result, meaning blood is likely present. #ForensicScience #BloodDetection #KastleMeyerTest #CrimeSceneInvestigati
The chemical test to detect blood: a. Marquis Test b. Duquenois-Levine Test c. Kastle-Meyer Test d. Scott Test The answer is option c: the Kastle-Meyer Test. This chemical test is used to detect the presence of blood. It is performed by applying a few drops of phenolphthalein solution to the suspected bloodstain, then adding hydrogen peroxide. A pink color change indicates a positive result, meaning blood is likely present. #ForensicScience #BloodDetection #KastleMeyerTest #CrimeSceneInvestigati
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