The College Board’s 2022 Advanced Placement Chemistry Exam is scheduled for Monday, May 2, 2022. The exam consists of two sections: a multiple-choice section and a free-response section. The free-response section is worth 50% of the total exam score.
Structure of the Free-Response Section
The free-response section of the 2022 AP Chemistry Exam consists of six questions. Each question is worth 10 points. The questions cover a wide range of topics from the AP Chemistry curriculum, including:
- Atomic structure and periodic trends
- Chemical bonding
- Chemical reactions
- Thermochemistry
- Kinetics
- Equilibrium
Tips for Answering Free-Response Questions
Here are some tips for answering free-response questions on the 2022 AP Chemistry Exam:
- Read the question carefully. Make sure you understand what the question is asking before you start writing your answer.
- Organize your answer. Use a logical structure to present your information.
- Support your claims with evidence. Use data from the question and your own knowledge to support your answers.
- Be specific. Avoid using vague or general statements.
- Write clearly and concisely. Use correct grammar and punctuation.
Common Mistakes to Avoid
Here are some common mistakes to avoid when answering free-response questions on the 2022 AP Chemistry Exam:
- Not reading the question carefully. This is one of the most common mistakes students make. Make sure you understand what the question is asking before you start writing your answer.
- Not organizing your answer. A disorganized answer will be difficult for the grader to follow. Use a logical structure to present your information.
- Not supporting your claims with evidence. Your answer will not be convincing if you do not support your claims with evidence. Use data from the question and your own knowledge to support your answers.
- Being vague or general. Avoid using vague or general statements. Be specific in your answers.
- Writing unclearly or concisely. Your answer should be easy for the grader to read and understand. Use correct grammar and punctuation.
2022 AP Chemistry Free-Response Questions
The following are the six free-response questions from the 2022 AP Chemistry Exam:
Question 1
A student prepares a solution by dissolving 5.00 g of sodium chloride (NaCl) in 100.0 g of water. Calculate the following:
(a) The molality of the solution.
(b) The molarity of the solution.
(c) The mass percent of the solution.
Question 2
A gas sample has a volume of 2.00 L at a temperature of 25 °C and a pressure of 1.00 atm. The gas is then compressed to a volume of 1.00 L. Calculate the following:
(a) The new temperature of the gas (in Kelvin).
(b) The new pressure of the gas (in atm).
Question 3
A reaction between hydrogen gas (H2) and oxygen gas (O2) produces water vapor (H2O). The following data are collected for the reaction:
| Initial concentration of H2 (M) | Initial concentration of O2 (M) | Initial rate of reaction (M/s) |
|---|---|---|
| 0.100 | 0.100 | 0.025 |
| 0.200 | 0.100 | 0.050 |
| 0.100 | 0.200 | 0.050 |
(a) Determine the order of the reaction with respect to H2 and O2.
(b) Write the rate law for the reaction.
(c) Calculate the rate constant for the reaction.
Question 4
A solution of a weak acid, HA, has a pH of 5.00. Calculate the following:
(a) The concentration of H+ ions in the solution.
(b) The Ka of the acid.
Question 5
A voltaic cell is constructed with a copper electrode and a zinc electrode. The copper electrode is immersed in a solution of Cu2+ ions, and the zinc electrode is immersed in a solution of Zn2+ ions. The initial concentrations of Cu2+ and Zn2+ ions are 1.00 M and 0.100 M, respectively.
(a) Write the balanced equation for the reaction that occurs in the cell.
(b) Calculate the initial cell potential.
(c) Calculate the change in free energy (ΔG) for the reaction.
Question 6
A solution of a strong electrolyte, NaCl, has a freezing point of -3.50 °C. Calculate the following:
(a) The molality of the solution.
(b) The boiling point of the solution.
Conclusion
The 2022 AP Chemistry Free-Response Questions cover a wide range of topics from the AP Chemistry curriculum. By following the tips provided in this article, you can increase your chances of success on the exam.
