What characteristic of phenolphthalein makes it appropriate to use in a HCl/NaOH titration? and is it possible to do a titration without it, and without using another indicator? Why? I really don't get all this because i was gone for the lesson.....

Answer 1

I wasn't there either; therefore, I don't know what was covered. But I'll take a stab.
a. I think the color change from colorless to faint pink is easy to see.
b. Without phenolphthalein or anothr indicator? One could use a pH meter.

Answer 2

Thank you VERY much!