Question

2. Explain neutralisation reaction of dilute sodium hydroxide and dilute hydrochloric acid by using phenolphthalein indicator.​

Answer 1

Explanation:

Phenolphthalein remains colourless in neutral or acidic solution but turns out magenta or pink in basic solutions. ... If HCl is added the solution loses its colour and turns out colourless since HCl neutralizes sodium hydroxide being an acid.