Ben Bernanke Chairman, Federal Reserve, United States Big Ben is stepping down when he term ends in January 2014, and Janet Yellen has been nominated to lead the Fed next year. Bernanke has steered the Fed during some of the biggest financial challenges since the Depression.
Definition of PHENOLPHTHALEIN. : a white or yellowish-white crystalline compound C20H14O4 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. See phenolphthalein defined for kids.ADVERTISEMENT.efinition of PHENOLPHTHALEIN. : a white or yellowish-white crystalline compound C20H14O4 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. See phenolphthalein defined for kids. ADVERTISEMENT.
It is a weak acid, which can lose H + ions in solution. The phenolphthalein molecule is colorless, and the phenolphthalein ion is pink. When a base is added to the phenolphthalein, the molecule â ions equilibrium shifts to the right, leading to more ionization as H + ions are removed.This is predicted by Le Chatelier's principle.henolphthalein is often used as an indicator in acidâbase titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments.