"person a - "i'm using phenolphthalein but i can't tell if the solution's acidic yet
an indicator commonly used in acid/base titrations which turns colourless in acidic solutions and is otherwise (in the concentrations commonly used in labs at least) pale pink
""person a - "i'm using phenolphthalein but i can't tell if the solution's acidic yet" What is the definition of "phenolphthalein"?