need some chemistry help?

Question

Phenolphthalein indicator is used for vinegar titration and bromthymol blue for strong acid- strong base titration. If we titrate ammonia with hydrochloric acid (weak base- strong acid) where should the equivalence be? What indicator would you use for this titration? Explain how the expected end point affects the transition point of the indicator we should use.

Answer 1

Methyl orange is normally used for HCl-NH3 titrations because the pH at which it changes colour is less than 7, corresponding to the pH of the solution of NH4Cl at the equivalence point.