Question

When few drops of phenolphthalein are added to dilute solution of sodium hydroxide a pink colour is formed.
What will be the final mixture when excess of HCl is added to it?

Answer 1

nutral solution is formed
so solution become colourless

Answer 2

Answer:

When few drops of phenolphthalein are added to dilute a dilute solution of sodium hydroxide a pink colour. The colour of dilute solution of Sodium hydroxide turns pink or adding Phenolphthalein as  NaOH is a base .When excess of HCl is added the final mixture becomes colourless due to  neutralisation of base with an acid.