<p>I have seen the Henderson hasselbach equation in different forms. Which one do you think is the most simple one to understand and use?</p>
<p>The one on your reference tables is plain and simple: </p>
<p>pH = pKa + log(A-/HA)</p>
<p>Here are some FRQs for titrations and buffers <a href=“http://apchemistrynmsi.wikispaces.com/file/view/Buffer%20Equilibrium%20FR%20worksheet.pdf/466296068/Buffer%20Equilibrium%20FR%20worksheet.pdf”>http://apchemistrynmsi.wikispaces.com/file/view/Buffer%20Equilibrium%20FR%20worksheet.pdf/466296068/Buffer%20Equilibrium%20FR%20worksheet.pdf</a></p>
<p>Wow! Thanks! So at the half equivalence point H+ = A- = HA? Can someone verify this?</p>
<p>I did much better on the FRQ’s. My total was 71%. Anyone know what score that is? (I’m guessing a 4?)</p>
<p>A 55.5% is a 5 33.3% a 3. So if you got at least 55.5% on your multiple choice you will get a 5. It’s based on points out of 150 so you can get even less on the multiple choice and your high points will even it out, but can’t miss a whole lot more.</p>
<p>can anyone please explain number 55 on the barrons practice test (<a href=“Barron's Online Test Preparation for AP Exams”>http://barronsbooks.com/ap/chem/</a>)?
How does removing a reactant shift an equilibrium to the right? Doesn’t shifting to the right mean that the reaction will proceed in the forward direction, which occurs when a reactant is added, and not removed?</p>
<p>Do I need to know about quantum numbers? Like spdf size shape orientation and spin?</p>
<p>@Waitwutmyname I highly doubt the curve is that generous… Even in the old exams the curve was at a higher percentage…</p>
<p>I believe a 50% was a 5 like 5 years ago… It’s a new curriculum this year and there’s probably going to be a new grading curve! Everyone work hard right now and try your best.</p>
<p>Also, Does anybody know what energy vs interparticle separation diagrams are???</p>
<p>44 more hours </p>
<p>44 more hours to study…Watching bozeman videos…Just bought 2 AP review books (5 steps to AP 5 and Barron’s) plus I have to do Princeton Review test for my school chem class…even though it’s not even up to date with the new curriculum… TOMORROW IS SUNDAY AND I’M GOING TO STUDY ALL DAY!</p>
<p>whats bozeman?</p>
<p>@MasterMaestro I’m going to laugh my ass off if you don’t get a 5 after all that tryharding</p>
<p>Who ever has a pdf of the practice exam, can you please send it to me? Other thank that, good luck cramming tomorrow guys</p>
<p><a href=“http://media.collegeboard.com/digitalServices/pdf/ap/ap-chemistry-course-and-exam-description.pdf”>http://media.collegeboard.com/digitalServices/pdf/ap/ap-chemistry-course-and-exam-description.pdf</a> 118 to 143 and <a href=“Barron's Online Test Preparation for AP Exams”>http://barronsbooks.com/ap/chem/</a> and Does anybody know what energy vs interparticle separation diagrams are??</p>
<p><a href=“Solids and Liquids - YouTube”>Solids and Liquids - YouTube;
<p>This is Bozeman - He’s a guy and his videos are nice…This whole thing is 8 hours long and I’m half way through… I would reccomend you watch the parts you least know about, but I’M GOING TO WATCH THE WHOLE THING. LET’S GET A FREAKIN 5 PEOPLE</p>
<p><a href=“http://media.collegeboard.com/digitalServices/pdf/ap/2013advances/AAP-ChemistryCED_Effective_Fall_2013.pdf”>http://media.collegeboard.com/digitalServices/pdf/ap/2013advances/AAP-ChemistryCED_Effective_Fall_2013.pdf</a>
Here’s the practice test…Dude…I’m just scared of the FRQs
Good luck with the practice test! Imma be cramming lol
it doesn’t have the answers btw @destinystudent </p>
<p>I took the Barron’s practice test #1. It has a few errors, but they are pretty noticeable (like the wrong letter might be in the key, but all of the answers have good explanations). I didn’t do that great, got a 38/60. However, I made a ton of stupid mistakes. I’m going to do all the practice exercises in the Barron’s tonight, and then do the other tests tomorrow. </p>