Question

When titrating a strong acid with a strong base, which is true?

1. the titration curve slopes upward
2. an indicator that changes at pH 8 would be acceptable
3. the pH changes slowly at the equivalence point

Answer 1

For any titration you want a sharp change in pH at the equivalence point; therefore, you KNOW #3 can't be right.
I'm not sure what #1 means but I would assume sloping upward would mean a more or less gradual change from beginning to end; therefore, I wouldn't pick #1.
The equivalence point for the titration of a strong acid with a strong base is at pH = 7.0. Most indicators are good over a range of pH = 2 so an indicator changing at pH = 8.0 should be ok.

Answer 2

So, in one of those titration curves, when it looks like it is stretched out with one side sloping down and the other up, is that representing titration with a weak acid or base?

Answer 3

Here is a typical titration curve. Scroll down about half way on the page.
http://www.sparknotes.com/chemistry/acidsbases/titrations/section1.html