Titrant

[Emily Chiem_1B]

Is the titrant always either a strong acid or strong base? Or can it also be either a weak acid or base?

[Reine Nakamura 1C]

I'm pretty sure titrants are always strong acids or bases, because they completely ionize in solution. This way, you know the concentration of the titrant and can determine moles of H30+ or OH- (depending on if it's a strong acid or base). From there, you can use this value to calculate the pH of the solution after the addition of titrant or whatever the question asks you for!
Hopefully this clears things up a little!

[kristinstlew]

Titrants can only be strong acids or bases, whereas the sample you add titrants to can be a weak acid, a weak base, a strong acid or a strong base.
There are 4 possible combinations:
1) Strong Acid (sample) and Strong Base (Titrant)
2) Strong Base (sample) and Strong Acid (Titrant)
3) Weak Acid (sample) and Strong Base (Titrant)
4) Weak Base (sample) and Strong Acid (Titrant)

[Chiara R 1K]

Additionally, I believe the titrant is always a strong acid or a strong base because they are easier to work with since they ionize completely. In an experimental setting, you would be choosing the titrant to you want to use, so it would be best to choose one that would make the calculations the easiest!