@APChemTeacher In statistics, a right-skewed graph means a greater proportion of the data falls to the left. https://onlinecourses.science.psu.edu/stat100/sites/onlinecourses.science.psu.edu.stat100/files/lesson03/distributions.gif
I meant that compared to the original graph at the Ea, the graph of the reaction at the lower temperature would have a smaller fraction, so it intersects the vertical, dashed Ea line at a lower point than the 120C graph.
I thought when you signed the agreement, you can’t discuss test questions. Yet people still do. Guys relax and enjoy your final days as a senior.
@catullus101… That makes sense… long time since I’ve taken a statistics class…
Also, your calculation in 6a is incorrect… your setup is right, but 1.8E-11=4x^3 would result in x=1.7E-4
@NASA2014 … Once the FRQ is released (which it was today) we can discuss that version of the FRQ… If you didn’t take that version you can’t discuss your version at all, and you really aren’t supposed to discuss the O version prior to when it’s released, but after it’s released it is fair game…
@APChemTeacher Whoops, my hand slipped (forgot to divide the 4), but since I redid the FRQs just now, your answer for 6a sounds more familiar and is probably what I put on the exam. Thanks for checking my answers! 
@catullus101 for 3 a) it is not Kp=[NO]^2/([N2][O2]) but it is Kp=(Pno)^2/(Pn2*Po2) (I just wrote each molecules in lower case for the sake of subscript) because it is Kp you don’t use the concentration for the calculation
I am so frustrated with myself for the delta S question… I lost so much time trying to figure out why delta S would be not close to 0 because I completely misread the question 
Oh my god what the hell I had no clue on the chromatography one so i guessed dye c and then dye a and I got that one probability right lmao and for formal charges I got -1 for both but I also guessed that since oxygen is more electronegative so the left diagram is better and I got those probably right
But dang it, I screwed up the Ecell values. AP chemistry teacher, why is one negative?
@catullus101 Also my chem teacher said that college board takes off one mark on each question that you get your sig fig wrong in but only max of 1 per question. (idk I could be wrong but my teacher has a lot of experience as a ap chem teacher)
does anyone when the answers to the free responses will be released?
the scoring guidelines i mean
Even if you missed the ecell values you can still get two points, because they will take whatever value you put into the delta g=-nfe equation, and dichromate would still be your titrant (if you got two positive values, like dichromate is still higher)
@Awesome2020 with the half-reactions try to make the the reaction above and you will see that for a)i) you have to use third and fourth one and for ii) you have to use fist and second one and since you change the signs when you “flip” the reaction you get .63V and -.07V
Ok I get it, but if I used the two positive voltages correctly in the delta g= nfe equation and labeled di chromate as my titrant, I would get full credit, right? Also for frq 4, if I put no explanation but just the correct dyes, how many points out of four would I get for that frq?
@Awesome2020 from what i remember seeing you get 1 pt for the correct answer and 1 pt for justification, so probably 2 at most?
@Awesome2020 You would probably get 2/4, assuming each question rewarded points based on identifying and explaining.
Would I get the point for identifying the unknown dye if I said the other day was halfway down the solvent front, indicating similar polarities to that of dye (something). my actual response was probably a lot more vague tho lmao
Won’t be until after we get our scores @ShrutiSapphire . After that, this exam is (even more) dead to me. I HATE YOU COLLEGEBOARD
@calculusjokes Yeah, sorry partial pressure, but your values/setup won’t change.
If they’re going to count sigfigs on every question, why would they specifically ask for sigfigs on 5b? Has your teacher been to the AP readings? There’s nothing on the scoring guidelines that indicates such a policy. And as @APChemTeacher said, they usually just pick a question to ask about sigfigs.
Oh my god I hate you college board why are these tests so hard!!
