Medium
5 mL of hydrochloric acid was taken in a test tube and a drop of phenolphthalein indicator was added. A definite volume of sodium hydroxide was added dropwise until the solution turns pink. What is the nature of the solution obtained now?
Explanation
Explanation
Phenolphthalein is colourless in acidic and neutral solutions but turns pink in a basic medium. Since the solution turned pink, all the acid has been neutralised and excess NaOH has made the solution basic.
PRO TIP
Re-check your working by substituting the answer back into the original question.