I would love to know more about this. Here you go; Average Scores 2017 Please post questions in THAT post. The number of moles of acid and base are 20 times greater in the second case. Would you agree regarding the FRQs? I don’t think you get credit without mentioning higher energy collisions. Ok so give me a range. Joseph – Let’s get one thing straight – the inclusion of buffers on the AP chemistry exam, including an entire question, is absolutely fair and a crucial component of the AP chemistry curriculum. For 1bii, if I shifted the graph to the right, but did not decrease the height of the curve, would I be marked off? It depends on how they interpret the words, “resistant to changes in pH”, that’s why I wrote two different paragraphs for that answer. Whether or not it gets credit I’ll have to ask around. 4/4 Q7. I spent a lot of time with my students on buffers. Just took my AP Calc exam. I initially answered 3e as you did Paul, but after seeing Adrian’s answer I asked myself why I didn’t solve it that way. But when you only get 2 points on a 10 point question, I wouldn’t consider that great. These rigorous instructors for general chemistry will put “wordy” (probably maybe even more wordy) problems to see if students can sift through information well. I expected buffers to be 1 part to a greater question — not a whole question. I felt cool cause I knew how to do that lol. Take your time to review all key concepts from the past year, and take a few practice tests if you haven’t already. The AP chemistry exam is a two-part exam designed to take about three hours. We also did a lab on designing an effective buffer. Also think it is probably 2 pts. I have found that too many of my students want to memorize their way through buffers and titrations, and the ones who are most successful at these topics are the ones can think their way through. Josh, I’ll quote Paul C., and his comment below. They had minor ones that I could have easily solved. You very well may still get a 5 on the test but to call the buffer question BS and talk about it being removed just shows that your were not prepared to answer a buffer question. for number 1.b.ii. Just hoping the International test looks similar. I’m not the only one that f’d the buffer one up badly. figs are nothing to do with chemistry and I am frustrated beyond belief with the CB’s unwillingness to clear up that particular mess. If I fall short, I’m retaking it next year. That was NOT the 2015 Operational Exam. There are several things on the SAT that are not on the AP, and secondly, don’t think that preparing for one is the same as preparing for the other – it isn’t. In all fairness, though, all students in AP chemistry at my school have taken honors chemistry the preceding year, so we have more time than many other teachers do. More tips on our blog (link in bio)! Buffers are a huge, integral part of the AP chemistry class, and to squeeze them in at the end, in a last minute rush, is a very, very bad idea. 3e. In the old days we saw a grade boundary for a 5 as low as the low-mid 60’s. Then again, I’m not completely sure what the AP folks would accept. I’ve taken 4 AP exams so far this year (10 throughout my high school career) and this is the only one I possibly got lower than a 5 on cause of the fkn buffer question. 3c – I imagine that once the net ionic equation has been written, simply pointing out that when a weak acid and its conjugate (as shown in the equation) are present, the solution is a buffer, would be sufficient without discussing limiting factors. However, it does not address the equilibrium constant. Insignificant? If that’s true I’ll be fine. I thought it was full of BS especially when they introduced mL. Many differences, see; https://www.adriandingleschemistrypages.com/sat/sat-subject-test-chemistry-2016/ and look at the ‘Content & Preparation section. For the Lewis diagram in question 1c, would a triple bond between the sulfur atoms, each with one lone pair and single bonds between Cl and S atoms with three lone pairs around each Cl be accepted. Sig figs are a load of sh*t. Just put the damn # down and round to 3 places like we do in AP Calc. I believe both reduction processes should be accounted for. What is this BS with the non-significant zeros. I’ll be pissed if that’s the thing that ruins the score I deserve. You could reason out that at the same temperature both CCl4 and HCl have the same kinetic energy… because CCl4 is in liquid state, the IMF’s were strong enough to cause attraction to other CCl4 molecules and caused the condesation. Another interpretation … If the water and alcohol are miscible and attracted to one another with H-bonding, both will be drawn into the wick. high AP scores can be used for course credit, Ace Your AP Exams With These 5 Test Prep Tips, 4 Easy to Overlook Tips for the ACT and SAT, 4 Tips for International Students Looking To Maximize SAT/ACT Scores, Test Prep 101: Guide to the SAT Math Section, What You Need to Know About the Latin SAT Subject Test. Jake – there have been many problems like this in the past, where the LDF’s of the much larger, but non-polar CCl4 molecules, outweigh the LDF’s and dipole-dipole IMF’s of the much smaller, but polar, HCl. 81/100, and the highest score that we’ve seen needed for a 5 on the new exam has been 79. #GotTheW #screwbuffers #dropthebufferquestioncausenooneknewwhatthehellitwassaying. So the 2nd student’s mixture has no buffering capacity at all. But the buffer one was so dumb. Burning an alcohol -water mixture must produce less energy than burning pure alcohol, since the water doesn't burn. Fkn hell. Like I didn’t know what to do. Does the peak for the higher temperature have to be lower? In fact, I would be perfectly happy (and would hope it would get full credit) with a response that explains the increase in rate ONLY in terms of higher energy collisions, and does not mention increased collision frequency. Easier than last years for sure. I did the 2014,15, and 16 free responses and did very well on them. I second this. Honestly, I think the FRQ’s are pretty straightforward! AP Exams are regularly updated to align with best practices in college-level learning. We learned buffers in the final 4 days of class. 45-63 = 3. #WednesdayWisdom from IvyWise Pro Bono #Student Kaitlyn: Give yourself time to present yourself as the best candidate possible. AP Exams are regularly updated to align with best practices in college-level learning. This is not a new thing. Here is an example: “For the decomposition of an anti-biotic in a person with normal temperature (98.6 F, 37 C), k = 3.1 x 10-5s-1 and for a person with a fever at 101.9F(38.8C), k = 3.9 x 10-5s-1. 9/10 Q1 The 2014 AP Chemistry free response had a similar question on the last problem. If they did intend for a calculation then I feel they should have asked for the actual pH to lead students down the calculation path. https://www.adriandingleschemistrypages.com/sat/sat-subject-test-chemistry-2016/, I’ve been warning against this since 2008, 2017 FRQ's Average Scores - Adrian Dingle's Chemistry Pages. It was so fkn stupid how they threw me off with a buffer problem. The ratio change is a subtle point, and gets far too (indeed perilously) close to an exclusion statement for my liking, i.e., that the computation of changes in pH of buffers are not required. My NEW answer! So would you say the curve would be lower than 2015 and 16, or greater. Wow! No one explained to me buffers in the way the AP exam required. Part (d) is tricky IF it wants something OTHER than capacity. 4,5 and 7 were also easy. If I got around a 33/46 on the FRQs, how likely is it that I got a 5 on this year’s chemistry test? If you were to grade this exam, would you accept that answer to 3d? Thanks. thanks. 2017 AP Exam Schedule: Week 1: Morning – 8am: Afternoon – 12pm: Afternoon – 2pm: Monday, May 1, 2017: Chemistry: Psychology: NA: Environmental Science : Tuesday, May 2, 2017: Computer Science A: Art History: NA: Spanish Language and Culture: Physics 1: Algebra-Based : Wednesday, May 3, 2017: English Literature and Comp: Japanese Language and Culture: NA : Physics … Ap Exams Suck,99€ 3: Psychology AP Exam: 0€ 4: CliffsNotes AP Biology 2021 Exam (English Edition) 11,02€ 5: Cracking the AP Calculus AB Exam, 2017 Edition: Proven Techniques to Help You Score a 5 (College Test Preparation) 17,07€ ( I will let you know soon!) The second solution contains 0.1 mol of each, while the first is (as you wrote) 0.005 moles of each. no, that’s not accurate. And it seems like they like references to activation energy. I’m planning to take it and just want to know if there’s anything additional I would need to learn or if I’m fine as is (from knowing the AP content). The 2015 grade boundaries were not released. Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. Share #222. kylxxx 15 replies 4 threads Junior Member. Maybe I am not thinking about it in the right terms or I am making assumptions I should not make? Check back in July when you get your score, I’d love to know what you got!
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