AP Scoring Guide Chemistry Unit 8 Progress Check MCQ Questions And Answer Keys.

AP Chemistry Scoring Guide



Unit 8 Progress Check: MCQ




AP Scoring
Guide
Chemistry Unit
8 Progress
Check MCQ
Questions And
Answer Keys.

, AP Chemistry Scoring Guide



Unit 8 Progress Check: MCQ

Buffer solutions containing and range in from 10.0 to 11.0. The chemical equation
below represents the equilibrium between and , and the table lists the composition of four different
buffer solutions at .




Buffer
1 0.150 0.100 ?

2 0.200 0.200 10.32

3 0.100 0.100 10.32

4 0.100 0.200 ?




1. Which of the following chemical equilibrium equations best shows what happens in the buffer
solutions to minimize the change in when a small amount of a strong base is added?


A



B



C



D




2. Which of the following mathematical expressions can be used to determine the approximate of
buffer 1
?

, AP Chemistry Scoring Guide



Unit 8 Progress Check: MCQ


A



B




C




D




3. Which mathematical expression can be used to explain why buffer 2 and buffer 3 have the same ?


A




B



C



D




4.
Pure water autoionizes as shown in the equation above. Based on this information, which of the
following is correct?

A The autoionization equilibrium for pure water favors the formation of reactants at compared to .



B The autoionization equilibrium for pure water produces the same amount of ions at and .



C At , for pure water.


D At , for pure water.