Web11.05 - Verhalten von Seifenlösungen. Beim Auflösen in Wasser reagiert Schmierseife alkalisch, wie die rot-violette Färbung des Phenolphthaleins andeutet. Zugabe von Säure erzeugt die entsprechende Carbonsäure. Das Phenolphthalein entfärbt sich und die entstehende Carbonsäure, die nicht mehr wasserlöslich ist, trübt die Lösung. Web2. A process of producing phenolphthalein which consists in heating a mixture of phenol and phthalic anhydride in the presence of anhydrous zinc chloride, adding to the mixture anhydrous aluminum chloride, continuing the heating of the mixture whilst stirring the same, and removing the zinc chloride, aluminum chloride, unreacted phenol and ...

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WebThe filtrate is diluted to contain 40 to 50 grams of phenolphthalein per litre. This diluted solution is cooled and then run into such amount of a 20% sulphuric acid solution as to … WebPhenolphthalein monophosphate as a substrate for serum alkaline phosphatase smallford college

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WebThe therapeutic response and side effect profile of the different doses favoured 30 mg phenolphthalein as the optimum laxative dose. Although theoretically superior, phenolphthalein glucuronide was not found to be a more effective laxative compared to phenolphthalein in normal subjects. WebIn the process for the preparation of phenolphthalein, the step comprising the reaction of phenol with phthalic anhydride in the presence of zinc chloride and from about 0.05 mol … Webphenolphthalein (countable かつ uncountable, 複数形 phenolphthaleins) (chemistry, pharmacology) A white or yellowish-white crystalline compound C 20 H 14 O 4 used in analysis as an indicator because its solution is brilliant red in alkalies and is decolorized by acids and in medicine as a laxative. songs of black empowerment