<p>Anyone have any predictions on Monday's chem exam for free response?</p>
<ol>
<li>Acid/Base Equilibrium</li>
<li>Gases/Thermo</li>
<li>Net Ionic/Precipitation</li>
<li>Electron Config/Lewis/Intermolecular Forces</li>
<li>Redox</li>
<li>Rates/Equilibrium</li>
</ol>
<p>Isnt it basically the same thing every year…</p>
<p>Yeah it is. You may as well just do or look through the FRQ from previous years.</p>
<p>Chem is kinda backwards though. The FRQ is generally the easier part, while the MC is very tricky.</p>
<p>the only thing i dont want is a lab FRQ</p>
<ol>
<li>Equilibrium
2 and 3. Kinetics & Gases</li>
<li>Reactions
5 and 6. Thermodynamics and Periodic Trends</li>
</ol>
<p>Just my 2 cents. I’m really hoping there isn’t a periodic trends question; I’m not great at them.</p>
<p>^^^You think the FRQ is easier than the MC?? How so? I can score around 60% on the MC, but the essays kill me… I’m talking maybe 30%. It’ll be a miracle if I pass. </p>
<p>Does anyone have any tips for the FRQ? Any way to rack up points easily?</p>
<p>Well, number 4 shouldn’t be too hard at all, for starters. Just know solubility rules and you’re half there.</p>
<p>But yeah just look at past FRQs, puggly. Thermodynamics and equilibrium are two topics I’d focus most on for the last two days.</p>
<p>Any chance of an electrochem question again?</p>
<p>Well, to me, MC is really hard and tricky. Lets lots of things to remember since they incorporate so much into so little questions.</p>
<p>For me, FRQ tends to be the easier, point booster. I either know it and its easy, or I don’t and I’m toast. So far in doing old FRQ, ive gotten either gotten 8/9 or 9/9 or ive gotten like 2/9 3/9. </p>
<p>But then for something like APUSH, i got a 76/80 on the 2008 exam. But when looking at some of the FRQ’s, the topics just seem really hard.</p>
<p>As i was going through the Princeton Review book, each chapter is introduced by a comment on its appearance on the ap exam. So far these topics “appear almost every year” as quoted by P Review</p>
<ol>
<li>Atomic structure/trend/relationship/bonding/molecular geometry</li>
<li>Gases</li>
<li>Equilibrium</li>
<li>Solutions</li>
<li>Electrochem (oxidation)</li>
</ol>
<p>Pretty much it. The good thing is that this will be 50% of your grade, so it is not a bad idea to focus your studying on these topics.</p>
<p>Do you use Pen or Pencil or either on AP chem frq?</p>
<p>one of the biggest things of the FRQ is knowing the format and how college board typically words the problems / the reponses that they want to see</p>
<p>you must follow their format or you are ****ed</p>
<p>Does anyone else really really really hate the reaction questions? Where you gotta cancel out spectators and know solubility rules and all that stuff? I can NEVER do those lol. I can do a combustion and thats about it lol</p>
<p>Same here. If its predicting products or complex ions im clueless. If its solubility i get the rules jumbled up half the time. But i seem to be fine with every other FRQ. Sometimes thermochem can be confusing cause you have to think about the + or - sign in relation to the reaction and the system.</p>
<p>But reaction questions are the worst. And it sucks that they are usually the question worth the most points</p>
<p>Does anyone know the basic rules to form a complex ion?</p>
<p>We never learnt anything about complex ions (or organic chem, nuclear chem, and lots of other things) so ive been trying to teach myself a lot today. My textbook doesn’t even really go into complex ions, so here are some kinda useful links I found. I understand the naming, coloring, and structure and such, but predicting complex ions as products is kinda sketchy for me. </p>
<p>[introducing</a> complex ions - ligands and bonding](<a href=“introducing complex ions - ligands and bonding”>introducing complex ions - ligands and bonding)</p>
<p>[complex</a> ions - names](<a href=“complex ions - names”>complex ions - names)</p>
<p>[complex</a> ions - colour](<a href=“http://www.chemguide.co.uk/inorganic/complexions/colour.html]complex”>complex ions - colour)</p>
<p>I suggest you guys look into the Princeton Review for Descriptive,</p>
<p>they talk about how for complex ions whenever you see a transition metal with either Hydroxides, Cyanides, Thiocynates, or Ammonia its gonna be a complex ion.</p>
<p>I think you just have to get the charges correct so the subscripts don’t matter. However I’m behind on FRQs and still need to review past ones and ATM, its my biggest worry</p>
<p>Complex Ions: </p>
<p>For example :</p>
<p>a concentrated solution of ammonia is added to a solution of copper(II) chloride</p>
<p>So the general rule is that we will have 2x the number of “ligands” as the charge on the cation.</p>
<p>So …</p>
<p>4NH3+ + Cu+ ----> [Cu(NH3)4] 2+</p>
<p>If you see, the NH3 is called the “ligand”. The general rule is that it contains 2x more than the charge on the cation ( the copper) – so, it has 4! There’s always some sort of charge on the complex ion as well - in this case, 2+ because we have 2 more NH3’s than Cu.</p>
<p>That doesn’t seem to work all the time ( or even most of the time).</p>
<p>Can you explain 4b. <a href=“Supporting Students from Day One to Exam Day – AP Central | College Board”>Supporting Students from Day One to Exam Day – AP Central | College Board;
<p>How do you know 6 ammonias will hop on the nickel?</p>