Question

20 Points! (2) Which of the following statements are true about a strong base and a weak base at a pH of 11?

HCl will not bring the pH of either solution to pH 7.


Both bases require the same amount of HCl to reach pH 7 because they are both at the same initial pH.


The weak base will require less HCl to bring the pH to 7 than the strong base.


The strong base will require less HCl to bring the pH to 7 than the weak base.

Answer 1

The answer to this question is that the strong base will require less HCl to bring the pH to 7 than the weak base. The string base ionizes completely so the [OH-] will be neutralized faster. The weak base has an equilibrium that will constantly shift to compensate for any [OH-] loss, meaning more HCl will be needed to titrate it to lower pH.