In a liquid-liquid extraction, the first liquid added was 30mL of 0.20M NaOH with Thymolphalein Indicator (blue color). Then, 30mL of 0.25M of Cinnamic Acid in Ethyl Acetate was added. These two immicicble liquids formed two layers when added together. Describe why the aqueous layer turns colorless during the extraction process. Be specific in your explanation. Solution Since the transition range of thymolphthalein indicator is around 9.3 to 10.5, below this it is colorless. Here the ethyl acetate does not deprotonate completely as all the NaOH is exhasusted to deprotonate the .20 M of acid. Remaining .05 M of acid could not be neutralize and thus contributing in lowering the pH. Hence, the pH is below 9.3 and indicator turns colorless indicating more concentration of acid than base..