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.
  1. 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.

  2. This question deals with standard definitions. The terms are explained on p. 42.

  3. The correct answer is an important characteristic of pH buffers. The incorrect answers are way off the mark.

  4. 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.

  5. 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.