AP Chemistry Unit 9 Progress Check MCQ Prep for Taylor

AP Chemistry Unit 9 Progress Check MCQ Prep for Taylor

Unit 9 of the AP Chemistry curriculum focuses on electrochemistry, including galvanic and electrolytic cells, cell potentials, and thermodynamic principles. This progress check includes multiple-choice questions designed to prepare students for the AP exam. Topics covered include standard reduction potentials, entropy changes, and the relationship between cell design and efficiency. Ideal for AP Chemistry students looking to enhance their understanding and performance in preparation for the May exam.

Key Points

  • Includes multiple-choice questions on electrochemistry concepts for AP Chemistry students.
  • Covers topics such as galvanic cells, electrolytic cells, and thermodynamic principles.
  • Focuses on standard reduction potentials and their application in cell design.
  • Designed to help students prepare effectively for the AP Chemistry exam.
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AP Chemistry Scoring Guide
Unit 9 Progress Check: MCQ
Copyright © 2020. The College Board. These materials are part of a College Board program. Use or distribution of these materials online or in print
beyond your school’s participation in the program is prohibited.
Page 1 of 21
Table 1
Cell Type Operating Cell Potential for Commercial Batteries,
Lithium-iodine
Zinc-mercury
Table 2
Half-Reaction Standard Reduction Potential,
used to power pacemakers and have replaced zinc-mercury cells. Table 1 provides the operating cell potential, ,
for each cell. Table 2 provides the standard reduction potentials for several half-reactions related to zinc-mercury
and zinc-air cells.
1. Based on the information given, which of the following is a major difference between the zinc-mercury cell
and the lithium-iodine cell?
A
During the initial cell operation, each reaction is thermodynamically favorable, but the larger operating
potential of the lithium-iodine cell indicates that its cell reaction is less thermodynamically favorable.
B
During the initial cell operation, each reaction is thermodynamically favorable, but the larger operating
potential of the lithium-iodine cell indicates that its cell reaction is more thermodynamically favorable.
C
During the initial cell operation, the oxidation of iodine is thermodynamically favorable but the oxidation of
mercury is not.
D
During the initial cell operation, the oxidation of mercury is thermodynamically favorable but not the
oxidation of iodine is not.
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AP Chemistry Scoring Guide
Unit 9 Progress Check: MCQ
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beyond your school’s participation in the program is prohibited.
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2. On average, after one year of operation, the potential of a lithium-iodine cell decreases by 1%-2%. Which of
the following best helps to explain the cause for the decrease in cell potential?
A
, and as the cell operates, decreases.
B
, and as the cell operates, increases.
C
, and as the cell operates, decreases.
D
, and as the cell operates, increases.
3.
The use of zinc-mercury cells in hearing aids has been replaced by zinc-air cells that operate using the
oxidation of by from the air, generating a potential of . Table 2 provides the standard
reduction potentials for the half-reactions used in zinc-mercury and zinc-air cells. Which of the following
best explains the modification to the cell design that is mostly responsible for the difference in standard cell
potentials for zinc-mercury and zinc-air cells?
A
The greater standard cell potential of the cell compared to that of the zinc-mercury cell most likely
results from the thermodynamically more favorable reduction of compared to .
B
The greater standard cell potential of the cell compared to that of the zinc-mercury cell most likely
results from the greater number of moles of required to reduce compared to .
C
The greater standard cell potential of the cell compared to that of the zinc-mercury cell most likely
results from the thermodynamically less favorable reduction of compared to .
D
The greater standard cell potential of the cell compared to that of the zinc-mercury cell most likely
results from the greater number of moles of hydroxide ions required to reduce compared to
.
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AP Chemistry Scoring Guide
Unit 9 Progress Check: MCQ
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beyond your school’s participation in the program is prohibited.
Page 3 of 21
4.
The diagrams above represent physical changes for potassium. Which of the following correctly identifies
the physical process and provides the correct for the process in the indicated diagram?
A
In diagram 1, the process is freezing and is negative.
B
In diagram 2, the process is melting and is negative.
C
In diagram 3, the process is boiling and is negative.
D
In diagram 4, the process is condensation and is positive.
5.
Two samples containing an equal number of moles of are kept inside separate 1-liter rigid containers.
The particle diagrams above show the distribution of molecular speeds in each sample. Based on the
information given, which of the following identifies the sample with the greater , and why?
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Faqs of AP Chemistry Unit 9 Progress Check MCQ Prep for Taylor
What are the main topics covered in the AP Chemistry Unit 9 Progress Check?
The AP Chemistry Unit 9 Progress Check covers essential topics in electrochemistry, including galvanic and electrolytic cells, standard reduction potentials, and thermodynamic principles. Students will encounter multiple-choice questions that assess their understanding of how these concepts apply to real-world scenarios. Additionally, the progress check emphasizes the relationship between cell design and efficiency, helping students grasp the practical implications of electrochemical principles.
How does the progress check help students prepare for the AP Chemistry exam?
This progress check is specifically designed to align with the AP Chemistry curriculum, providing students with practice questions that reflect the style and content of the actual exam. By working through the multiple-choice questions, students can identify areas where they need further study and reinforce their understanding of key concepts. The focus on electrochemistry prepares students for questions they may encounter on the exam, enhancing their overall confidence and performance.
What types of questions can students expect in the Unit 9 Progress Check?
Students can expect multiple-choice questions that assess their knowledge of electrochemistry, including the operation of galvanic and electrolytic cells, calculations involving standard reduction potentials, and the principles of thermodynamics as they relate to chemical reactions. The questions are designed to challenge students' critical thinking and application skills, ensuring they are well-prepared for the complexities of the AP Chemistry exam.
Why is understanding standard reduction potentials important in AP Chemistry?
Understanding standard reduction potentials is crucial in AP Chemistry as it allows students to predict the feasibility of redox reactions and calculate cell potentials. This knowledge is fundamental for analyzing galvanic and electrolytic cells, as it helps students comprehend how different half-reactions contribute to the overall cell reaction. Mastery of this concept is essential for success on the AP exam, where students must apply these principles to solve complex problems.