<p>You can’t just add the potentials up for that…you need to convert to delta G…and then get E from delta G (-nfE = delta G)</p>
<p>and cutoff is usually 43-45 for honors. </p>
<p>took local round, trolled by a couple problems…damn prolly 55-57/60</p>
<p>Results come after March 31?</p>
<p>Where did you hear the cuttoff? and is that just honors or high honors? seems a bit low…</p>
<p>Results for? the local exam? i got my results the day i took it ( March 13th)</p>
<p>Are we allowed to disclose score/ discuss the test yet?</p>
<p>What books are good for the national exam? Besides what you learn in AP Chem and simple organic chemistry, I can’t really tell if there is much new material or in what subject it is. There are a lot of things on the past part 1’s that seem logical but that I’ve never officially covered in my book (Chang 9th ed.). I could figure them out using my noggin’ and wikipedia, but on the test day I would ideally understand these things before seeing the test.</p>
<p>does it officially say somewhere that only multiple choice is counted for honors selection?</p>
<p>Hey guys can someone help me on this question? Its from the national exam of last year.</p>
<p>What is the pH of a 1.00L sample of a buffer solution containing 0.10 mol of benzoic acid and 0.10 mol of sodium benzoate to which 0.010 mol of NaOH has been added?
Ka = 6.5 X 10^-5 </p>
<p>I used the moles of acid and sodium benzoate but I have no idea where the NaOH comes in. Any help would be appreciated.</p>
<p>Also does anyone know what the score on the national exam first part for getting in the Top 150 was last year?</p>
<p>The NaOH reacts with the benzoic acid until there is no NaOH left. There is now .11 mol NaBenzoate and .09 mol benzoic acid. Using the henderson hasselbalch equation, do the following -logKa + log[NaBenzoate]/[Benzoic acid]. I am getting pH=4.27, is that the correct answer?</p>
<p>Still wondering what book could cover most of what is on the national exam but which is not covered by AP Chem…</p>
<p>top 150 are selected based on MC only. Top 50 and above are selected based on the cumulative score.</p>
<p>If I recall correctly 44 was enough to get into 150 in 2010.</p>
<p>there is no “one book”. how high do you want to go?</p>
<p>Zumdahl is enough get to top 150. The higher one wants to get the more he/she needs Organic Chemistry in addition to General Chem.</p>
<p>I want to make it to the camp, which is top 20 (I think). So I should just try to learn organic chemistry?</p>
<p>Lol good luck learning the organic chemistry in 2 weeks</p>
<p>OK, so grab this book [Organic</a> Chemistry: David R. Klein: 9780471756149: Amazon.com: Books](<a href=“http://www.amazon.com/Organic-Chemistry-David-R-Klein/dp/0471756148/ref=tmm_hrd_title_0]Organic”>http://www.amazon.com/Organic-Chemistry-David-R-Klein/dp/0471756148/ref=tmm_hrd_title_0)
and the solutions manual
[Organic</a> Chemistry, Student Study Guide and Solutions Manual: David R. Klein: 9780471757399: Amazon.com: Books](<a href=“http://www.amazon.com/Organic-Chemistry-Student-Solutions-Manual/dp/047175739X/ref=pd_sim_b_1]Organic”>http://www.amazon.com/Organic-Chemistry-Student-Solutions-Manual/dp/047175739X/ref=pd_sim_b_1)</p>
<p>Overnight ship it to your house, and then start reading. Since you have only around 12 days, you have to read 2-3 chapters a day. Should be possible, as long as you pull 11 all-nighters and keep a gallon of coffee with you.</p>
<p>Generally speaking, 1-2 years of very hard work is needed to get to top 20.</p>
<p>Take an old test, analyze the type of knowledge and reasoning skills needed. Identify weak points, work on those. Rinse and repeat.</p>
<p>As a reference point: top 20 score ~90% on the national exam.</p>
<p>whats the consensus on the relative difficulties of older mc tests?
the pre-2008 seems easier for me.</p>
<p>@ChemistryTutor<br>
Are you positive that the top 150 are determined solely based on the first 60 question multiple choice? Does it say anywhere on the website?</p>
<p>@justin5585 they machine grade the MC and then grade the top 150 FR and lab portions; they don’t want to have to grade almost 1000 full tests for basically no reason.</p>
<p>So the local exam results are all out? I am living in GA, and so far we did not hear from the ACS chapter in GA…</p>
<p>it probably depends on the chapter</p>