@Dorfdude8 not necessarily, 34 is usually the number they come up with, but it can change from time to time.
The frqs weren’t any easier or harder than last year IMO, so I’d guess that the curve will be set at 34. That could explain the small drop in %5s this year. Maybe 1% of students had time to answer the last question last year and wouldn’t have otherwise gotten a 5.
The overall curve should be set at 74-75%. Any higher than that would be ridiculous for an AP test.
@baseball2322 That was similar to what I was thinking.
I wonder how they graded that titration graph. I could see a point for the half equivalence, but how would they grade the other parts of the graph? Would they grade based on correct steepness of the slope or were we required actually calculate and plot exact points on the graph even though we were not told or hinted to do so? How accurate is “accurate”?
@pillowspillows You had to have the midpoint at the correct coordinates, and then the descent to the endpoint should show a clear buffer region with a slowly descending line. It was a weird looking graph, but there are correct ways to draw it.
Thanks, everyone! Mad at myself because I got the right answer, drew the titration curve, thought it looked wrong, so changed my answer/the curve 
What’s the max number of points for an FRQ? 9?
@glasshours did your teacher not cover the point values? All long FRQ (1-3) are worth 10 points EACH. All short FRQs(4-7) are worth 4 points EACH.
@michelle426 how “clear” do you think it should have been? I did have a buffer zone that was a near horizontal line for a portion of the graph but it wasn’t very long. Also I drew the vertical line through the = point and then continued past it which I’m not sure if you were supposed to do.
@pillowspillows since you do have a time crunch, all you have to do is mark keypoints (e.g. midpoint) and draw a vague shape/likeness of the curve. It is very much like connect the dots. I think they won’t go too hard on the shape. And yes, drawing through the endpoint is perfectly fine, as it shows that the strong substance in excess starts driving the pH.
@michelle426 - Not at all. Thanks!
I have to imagine that the graph will be 3 points: one for the half equivalence point and one for each region before and after the half equivalence point. Unfortunately, those are 3 points I didn’t get because we didn’t do any acid/base titration in class until after the exam
I do have a question about the experimental mc questions though: are they likely to be the tougher questions? I’d hate it if they were all easy questions.
@baseball2322 They’re supposed to be inconspicuous enough so that students don’t know exactly which ones are experimental. They probably aren’t likely to be the harder questions because many students skip the harder questions and guess which would make it unfair for students who spent legitimate time on those harder questions. So, I would assume that they would mostly be easier questions because almost everybody would legitimately do those questions.
But then why would they have to be “experimental”? Why not just make the MC section 50 questions if that is the case? My assumption (could be wrong) is that they are questions that they are considering implementing in the future and want to see how well students do on them. If they were super easy, I would think that college board would know that students would do fine.
I think the experimental are just different types of questions that haven’t been tested before. I don’t think they are necessarily based on difficulty.
On the other hand, are we positive that there are experimental questions? Isn’t it possible that college board just scales it to 50 (as suggested here: http://www.chemmybear.com/apoc2014/roger_kugel_apresults_2014.pdf)?
Hmm, that’s interesting. The official practice test has only 50 questions and the official rubric from CC that my teacher gave me had something along the lines of
MC correct x 1.0000 = MC raw score
FRQ 1 correct x 1.0869 = FRQ 1 raw score
FRQ 2 correct x 1.0869 = FRQ 2 raw score
etc…
The “1.0000” also implies that only 50 MC questions were scored.
I’m not too sure how accurate the info from that file is.
@pillowspillows this is how the test is scored:
60 MC questions, 10 experimental, therefore unscored even if you mark them incorrect. 60-10=50 MC (1 point for each right answer)
10 points for FRQ 1-3 each, 4 points for FRQ 4-7 each. Total points earnedx1.0869= curved/50
FRQ+MC= score/100
also, shoutout to all these CC homies on the east coast. Good luck with scores tomorrow! :)) Y’all are gonna do great ok
haha correction to my previous comment about scores: they come out starting the sixth based on your geographic location. Regardless, good luck to the east coasters because they receive them first.