Update: I've added a link to the 2018 free-response questions.
As you may already know, the AP Chemistry test changed in 2014. It's now more like a college final exam than a high school test, and you can't study for it as you'd prepare for SAT Chemistry, which largely tests memorization.
The questions have become more conceptual, and there's a large focus on lab chemistry. They remind me of the SAT's Critical Reading section: if you're not extremely careful, you'll misread the something without realizing it.
These changes aren't fully reflected in the prep books, not even the 2017 Princeton Review book I recently looked at. Of the students who took the AP exam, only 12.6% received a 5 in 2018, as opposed to 18.2% in 2013.
The good news is that you can train yourself to be one of the top 9% who gets a perfect score. I recommend taking released exams and free-response questions two months before the AP test. Prepare a list of questions you'd like to review in each tutoring session.
If you need more practice material, do the hardest problems at the end of every chapter of your AP Chemistry textbook. Treat them like free-response questions: write out a paragraph-long explanation for explaining how you arrived at each answer. Since your book won't have free-response-style answers in the back, ask your tutor to check your explanations for completeness.
Practice Tests
Here are some official practice questions. Start at page 117 of the booklet, which is PDF page 126.AP Chemistry sample multiple-choice questions and answers
The College Board has also released the free-response questions from actual AP exams:
2014 Free-response questions and answers
2015 Free-response questions and answers
2016 Free-response questions and answers
2017 Free-response questions and answers
2018 Free-response questions and answers
AP Chemistry is my favorite subject to tutor. If I didn't like the chemistry, I wouldn't have bothered to get two degrees in it! Contact me if you'd like to schedule a session.
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