My 2019 AP Chemistry Released Exam Draft Answers & Comments appear below. The questions are here. These are DRAFT answers and may change as errors are pointed out to me, and other thoughts come to my mind. Should you find an error PLEASE let me know by commenting on this post below, rather than emailing me or using the contact form me (that way all problems can be addressed in this post), and I will comment/change as necessary.
PLEASE NOTE: Any of my comments below about how your individual answers might be graded, are highly speculative – you should not take them as fact.
Overall, another crushingly easy exam. Things have changed a lot since 1971, question 14 (the first question here) was asked on the exam, but the 2019 operational FRQs reflect what the AP exam has become in the brave new world. Ho hum.
It’s funny to me how the CB/ETS/TDC keeps on trying to show a commitment to lab work by putting lab based questions into the mix. As we all know, one never needs to pick up a test tube in order to answer these questions, so all of their work is in vain. Want to test lab? Have a lab exam.
(e) Should NOT require any mention of massing the cup IMO since one can tare the balance, but we will see. I’d be vehemently opposed to insisting upon any mention of the cup being required.
(c) Has the accumulation of LDF’s overcoming dipole-dipole and LDF been tested enough yet?
(e) If one calculates Kc here, it’s not too bright – you just worked out a pressure!
(g) I STILL love SUMMING the bond energies after making breaking positive and making negative. That’s the way to go I feel.
(a) Remember when inorganic chemistry, solubility rules and equation writing mattered?
(f)(ii) Could be hard to grade
(g) I don’t know if more than what I wrote might be required
(h) I prefer a long-winded calculation here, but it’s not required.
(b) This question is asked in 8th grade classes across America.
(a) PES is such an uninteresting addition. The COMPLETE spectra really make this questions too easy.
Is this really an AP problem?
Oh look, more lab!
I KNOW that kids will miss a ton of points, but that’s mostly because there a vast number of children across the country that have no intellectual business taking this exam in the first place. For those that are correctly placed, I bet that they are glad it’s not 1971!