Feedback: Multiple Choice Quiz 3
All of the correct answers have a green check mark.
Incorrect answers have the "red-lit" button next to your choice.
- The correct answer is a useful "rule-of-thumb". It corresponds to the plateau region around the inflection point discussed by Campbell. See p. 50.
- This question deals with standard definitions. The terms are explained on p. 42.
- The correct answer is an important characteristic of pH buffers. The incorrect answers are way off the mark.
- The dissociation constant of water is multiplied by the water molarity (55.5 M) to give Kw. Kw is also called the ion product constant for water (p. 43). It is [H+][OH-], i.e. the correct answer indicated.
- Buffer function depends only on the pKa of the weak acid (or base). The same "rule-of-thumb" noted above applies to polyprotic acids and to monoprotic acids.