AP Scoring Guide Chemistry Unit 8 Progress Check MCQ
Questions And Answer Keys
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
?
https://www.stuvia.com/
, 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.
https://www.stuvia.com/
, 5. at
Based on the information above, which of the following is true for a sample of pure water at ?
A
B
C
D
6.
The endothermic autoionization of pure water is represented by the chemical equation shown above. The
of pure water is measured to be 7.00 at and 6.02 at . Which of the following statements
best explains these observations?
A At the higher temperature water dissociates less, , and the water becomes basic.
B At the higher temperature water dissociates less, , and the water remains neutral.
C At the higher temperature water dissociates more, , and the water becomes acidic.
D At the higher temperature water dissociates more, , and the water remains neutral.
7. Which of the following gives the best estimate for the of a solution at
?
https://www.stuvia.com/
Questions And Answer Keys
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
?
https://www.stuvia.com/
, 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.
https://www.stuvia.com/
, 5. at
Based on the information above, which of the following is true for a sample of pure water at ?
A
B
C
D
6.
The endothermic autoionization of pure water is represented by the chemical equation shown above. The
of pure water is measured to be 7.00 at and 6.02 at . Which of the following statements
best explains these observations?
A At the higher temperature water dissociates less, , and the water becomes basic.
B At the higher temperature water dissociates less, , and the water remains neutral.
C At the higher temperature water dissociates more, , and the water becomes acidic.
D At the higher temperature water dissociates more, , and the water remains neutral.
7. Which of the following gives the best estimate for the of a solution at
?
https://www.stuvia.com/
