<p>what kind of equilibrium prob do you/your teacher think is
going to be on it?</p>
<p>what about the other FRQ's??
lab in math part or essay?</p>
<p>also its 80 mc in 55 min?
and how long do we get for the essays</p>
<p>My teacher think K (sub a) problem will definitely be on there.
Let's see what happens.</p>
<p>80 MC in 90 Minutes</p>
<p>And my teacher says that we are due for a Titration question. :O</p>
<p>oh okay.
what do you mean sub a
and what about how long for FRQ's</p>
<p>55 Minutes for 3 Calculator Questions
40 Minutes for the Reactions Question and 2 Essay Questions.</p>
<p>K sub a is the acid dissociation constant.
basically an acid-base problem. titration.</p>
<p>What about the other 5? Any predictions?
What about the laboratory question??</p>
<p>My chemistry teacher predicted that the equilibrium problem will be Kp, Kc, or Kb.</p>
<p>yea idk wth u see 80 questions in 90 min</p>
<p>"Section I (90 minutes) will not change and will still consist of 75 multiple-choice questions with broad coverage of chemistry topics"</p>
<p>THE MC should be easy. It's the FRQ that I"m worried about. Anybody got a sample titration FRQ?</p>
<p>I have a feeling its gonna be crazy hard. Last year's was farily easy at least the FR and plus they are changing the format. q #1 I think may involve an acid base titrations</p>
<p>Afruff - are you looking for sample titration FR from old AP tests, or are you looking for additional practice beyond the old AP questions?</p>
<p>My teacher has called:</p>
<ol>
<li>Acid Base</li>
<li>Now mandatory.Some type of lab with math, since they announced they could now do this, it figures they would the first year. Maybe grav. analysis, maybe a gas law problems where you collect a gas over water.</li>
<li>This one is now mandatory. Kinetics is likely. Maybe with a graph and solve for rate.</li>
<li>Descriptive Chem. I figure since they messed with the format, they won't put anything insane on it this year. Probably a precipitation, an organic combustion, and a redox. Hopefully no complex ions, then you have to take potshots when guessing charge and geometry.</li>
<li>Periodic Trends/Intermolecular forces essay.</li>
<li>Lab essay.</li>
</ol>
<p>I think the test will be easier b/c they will offset the increase in difficulty due to the new format by making the questions themselves easier. If not, more people will fail and that itself will offset the more difficult test.</p>
<p>hopefully itll be easier bc they changed the format</p>
<p>Sample AP titration FRQ's please. Also, anybody have one of the FRQ's with the spattering and such (with the heating of a hydrated crystal).</p>
<p>You want Question 1 Titration problems (concentrate on equilibria and calculations) or a lab titration question (concentrates less on calc and more on how-to).
Re spattering - I only have the FR questions since 1999 with me, and there are no spattering questions. (Only one on hydrated crystals at all.)</p>
<p>Sample Acid/Base Eq Question (with titration)
NH3 + H2O <--> NH4+ + OH-
a) Write the eq expression
b) Determine the pH of 0.0180 M NH3
c) determine the Kb
d) Determine the percent ionization in 0.0180 M NH3
e) 20.0 mL of 0.0180M NH3 is titrated to equivalence point with 0.0120M HCl.
i) Determine volume of HCl needed
ii) Determine pH after 15.0 mL of HCl is added
iii) Determine pH after 40.0 mL of HCl is added.</p>
<p>Here's a tip on acid/base titration:</p>
<p>Always know how to use the Henderson-Hasselbach equation.</p>
<p>the best way to answer the descriptive chem questions involving Complex ions is to double the charge of the lewis Acid in the reaction....</p>
<p>Can somebody please do gfaith's titration problem? is NH3 aqueous or a liquid?</p>
<p>Sure, I'm going to do it right now</p>
<p>NH3 is aqueous</p>
<p>Revision: Don't we need to know Kb to do part b?</p>