What indicator would be used if we were titrating with HCl in the buret and NaOH in the flask since phenolphthalein is not appropriate?

Answer 1

In most cases of strong acid-strong base titrations phenolphthalein is appropriate so to answer this question best I would need to know the concentrations being titratrated. Bromothymol blue might be good. Phenol red might be good. You want an indicator that will change pH at 7.