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Errors in the 2021 and 2022 AP Chemistry Chief Examiner’s Reports

February 29, 2024

While I was recently updating the Mapped AP FRQ Worksheets to add the 2021, 2022 and 2023 FRQs, I came across multiple errors in the Chief Examiner’s reports for 2021 and 2022. Here’s a summary of those errors.

2021

I have found two errors in the 2021 report.

The first is a typo on the breakdown of Q6(b) where what I assume is supposed to be SAP-5.B is reported as SAB-5.B.

The second is less trivial, since it assigns SPQ-5.A (7.11) to Q6(c). That’s impossible since the LO references Ksp and there is no Ksp given. It would have to be associated with some kind of particulate based LO, perhaps SAP-3.C (TOPIC 2.3)?

2022

LO TRA-8.B (TOPIC 7.10) is assigned to Q2(f).

Utilizing the Kp expression determined in part (e), students were provided the equilibrium partial pressure for all gas species and asked to calculate the value of Kp in part (f) (TRA-8.B, 5.C).

Here’s the original question, and the LO in more detail.

I think that Q2(f) should be assigned to TRA-7.B (TOPIC 7.4), which reads,

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