<p>err sorry dude. didn't mean electron configuration, like electronic shape...... how there's a geometric shape w/ atoms and electronic shape w/ electrons...... 4get it I typed it wrong.</p>
<p>new question.</p>
<p>if you add NaC2H3O2 to water, what happens to the Ph? Explain.</p>
<p>Alright, so sodium acetate is a strong electrolyte, which means it completely dissociates to form sodium and acetate ions.</p>
<p>Since the acetate ion is the conjugate base of acetic acid, it can react with water to produce OH-.</p>
<p>So I'm guessing it becomes basic? I remember doing acid/base a long time ago . . </p>
<p>Describe the molecular geometry of CF4 and SF4, and how the polarities of the two differ (in terms of their geometry). [real ap FR question]</p>
<p>look at EN trend and figure out which is polar and which is not...</p>
<p>I don't get about calculator policy on the test. Anybody care to explain?</p>
<p>sarorah, how effective, efficient are the chemmybear study guides to which you provided a link to?</p>
<p>Which is the most effective? (among the links you provided)
I don't mean to be a pain in the axx, but I'm really short on time and just wanted to know!</p>
<p>thanks!</p>
<p>CF4 is tetrahedral, SF4 is (don't know terminology) S on top w/ 4 Fs on the bottom. SF4 is polar b/c there are 2 extra electrons that go ontop of the S molecule.</p>
<p>you have solutions of AgNO3, Na2CO3, NaCl, and H2S in solutions of W,X,Y,and Z. using only test tubes and graduated cylinders, explain how you would determine which solution is what (no Ph paper allowed)</p>
<p>
[Quote]
I don't get about calculator policy on the test. Anybody care to explain?
[/Quote]
</p>
<p>Are you sure we can use calculators on the AP Exam? I thought we couldn't.</p>
<p>wowser -
[quote]
Any scientific calculator, including a graphing calculator, can be used for Section II Part A of the exam.</p>
<p>Section II (FR) is divided into two parts, A and B. Part A of Section II asks you to solve two mathematical problems. There is 1 required problem, and then you choose one of the next two problems for the second question. Calculators are allowed, and a table of equations and symbols is provided. The periodic table is available too. Part A is allotted 40 mins and is worth 50% of the Section II points. All calculators and equation tables must be put away before the start of Section II Part B.
[/quote]
For section II, part B, only the periodic table is available. There are 4 questions. First question asks to write unbalanced chemcial equations for 5/8 choices. You have to be able to predict products and eliminate specator ions, but you don't have to balance. Second and third questions MUST be answered and are required. One describes some general aspect of chem . .. the other is directly related to Lab work "experienced in the AP course". Fourth question - student is allowed a choice of 2 questions about general chem principles.</p>
<p>Part A is 75 MC, no calc allowed. So only section 2, part A with the math problems can a calc be used.</p>
<p>sucks. . . i've always been allowed to use a calculator the entire year .. </p>
<p>wowser, don't worry, this thread is for anyone who has any question about the AP Chem exam . . we're all here to help each other :)</p>
<p>Among the links I provided, I'd recommend printing out the solubility rules from [url=<a href="http://www.shs.nebo.edu/Faculty/Haderlie/apchem/apchem.html%5Dhere%5B/url">http://www.shs.nebo.edu/Faculty/Haderlie/apchem/apchem.html]here[/url</a>] (memorize them) and doing all the FRs from 1980 onward since those answers are provided, from [url=<a href="http://www.gashalot.com/chem/dbhs.wvusd.k12.ca.us/ChemTeamIndex2.html%5Dhere%5B/url">http://www.gashalot.com/chem/dbhs.wvusd.k12.ca.us/ChemTeamIndex2.html]here[/url</a>]. Also, you might want to look at Stuff I Should Know For The AP Test But Don't Know Yet, which is at chemmybear.com</p>
<p>I'm going to use the cards to look over as a quick review during school or wherever I might be where I can't access my barron's ap chem book . . and I might look at one of the notes summary links near the end as a great refresher, because I have to study for 2 other ap's also.</p>
<p>Alright I have to go soon, here's the last posted question:</p>
<p>you have solutions of AgNO3, Na2CO3, NaCl, and H2S in solutions of W,X,Y,and Z. using only test tubes and graduated cylinders, explain how you would determine which solution is what (no Ph paper allowed)</p>
<p>alright thank you SOOO MUCH!</p>
<p>^... i don't know... omg ....</p>
<p>cmon folks it isn't that hard....... here's a hint</p>
<p><em>has something to do w/ precipitates and colors</em></p>
<p><em>EDIT</em>- there is a full thread about study questions, and mine is posted there. go to that thread.</p>
<p>Silver nitrate is a black solution so that can be identified off the bat. Mixing AgNO3 with NaCl will form a white precipitate AgCl so now you know those two. H2S can be distinguished from Na2CO3 by its four odor of rotten eggs. You can confirm you predictions by mixing H2S and Na2CO3. I’m pretty sure it will make CO2 gas, so the foul smell will go away.</p>
<p>Why do many reactions involving chlorine molecules have non-integral orders in their rate laws?</p>
<p>What is D=PM/RT??
LOL I’ve never seen that in my life. Hello 1 on AP chem test…</p>
<p>^ Don’t worry, it’s just a variation of PV = nRT</p>
<p>whew… ok. I know PV=nRT haha.</p>
<p>only 60% to get a 5? really? I thought it was much higher? Dang. </p>
<p>I’m really really scared.</p>
<p>And I suck at those color questions. Do they seriously expect us to know what colors those compounds and solutions and whatnot are supposed to be?</p>
<p>And I’m scared that I’m gonna mess up on arithmetic hahaha. Man, I wish we could use a calculator for the whole test…</p>