Chemistry of solutions question

Hey guys. I've got a question concerning chemistry of solutions :

Weak bases conjugate strong acids
Weak acids conjugate strong bases
Strong acids -> weak bases
Strong bases ->weak acids
pH does not change when a strong acid/base is dissolved
pH changes only when weak base/acid is disolved
Acids lower the pH, bases make it go higher
The solution is basic if the PRODUCTS have OH- ions
the solution is acidic if the products have H30 (H+) ions

If something is wrong, please tell me.
thank you

pH does not change when a strong acid/base is dissolved
pH changes only when wear base/acid id dissolved

I would double check that part...everything else seems to be right