**OFFICIAL** AP Chemistry 2014 Thread

Test Preparation AP Test Preparation
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<p>For everyone who was asking about VSPER Geometries and the alike, here you go…</p>

<p>2 Centers of Negative Charge – Linear – 180 – sp hybridization
3 Centers of Negative Charge – Trigonal Planar – 120 – sp2 hybridization
4 Centers of Negative Charge – Tetrahedral – 109.5 – sp3 hybridization
5 Centers of Negative Charge – Trigonal Bipyramidal
6 Centers of Negative Charge – Octahedral </p>

<p>My question is, do we have to know molecular geometries as well? By molecular I mean the following: </p>

<p>2 Centers of Negative Charge, 2 Bonded 0 Unbonded – Linear </p>

<p>3 Centers of Negative Charge, 3 Bonded 0 Unbonded – Trigonal Planar
3 Centers of Negative Charge, 2 Bonded, 1 Unbonded – Bent
3 Centers of Negative Charge, 1 Bonded, 2 Unbonded – Linear </p>

<p>4 Centers of Negative Charge, 4 Bonded, 0 Unbonded – Tetrahedral
4 Centers of Negative Charge, 3 Bonded, 2 Unbonded – Trigonal Pyramidal<br>
4 Centers of Negative Charge, 2 Bonded, 2 Unbonded – Bent
4 Centers of Negative Charge, 1 Bonded, 3 Unbonded – Linear</p>

<p>5 Centers of Negative Charge, 5 Bonded, 0 Unbonded – Trigonal Bipyramidal
5 Centers of Negative Charge, 4 Bonded, 1 Unbonded – See-Saw
5 Centers of Negative Charge, 3 Bonded, 2 Unbonded – T-Shaped
5 Centers of Negative Charge, 2 Bonded, 3 Unbonded – Linear</p>

<p>6 Centers of Negative Charge, 6 Bonded, 0 Unbonded – Octahedral
6 Centers of Negative Charge, 5 Bonded, 1 Unbonded – Square Pyramidal
6 Centers of Negative Charge, 4 Bonded, 2 Unbonded – Square Planar</p>

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<p>@KbbGrizzly lol ok, I’ll try–I’m really way more confident on my AP Psych Exam because I took a practice test that my teacher sent us and I got like 4-5 sooo I am way more confident on that one. I haven’t even started practicing on my FRQ’s! I mean I kind of did but I’m just spinning in circles and I just found out that the Princeton Review Book isn’t accurate to this year’s test! And I just spent weeks poring over that book too so now I don’t know I’m just going to study for a few more hours and do the best that I can. Chemistry, and Biology as well, aren’t even close to my major anyway…so. I’m a Psych major.</p>

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<p>Also, gonna try this again…please don’t be an a**hole
<a href=“https://docs.google.com/document/d/1N4Z4VcY5Woqdk1t99JU0ilzXKL36kzXcLv-JTUC856M/edit?pli=1”>https://docs.google.com/document/d/1N4Z4VcY5Woqdk1t99JU0ilzXKL36kzXcLv-JTUC856M/edit?pli=1&lt;/a&gt;&lt;/p&gt;

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<p>@NerdAlert94‌ its really easy
watch this
<a href=“https://www.khanacademy.org/math/arithmetic/decimals/significant_figures_tutorial/v/significant-figures”>https://www.khanacademy.org/math/arithmetic/decimals/significant_figures_tutorial/v/significant-figures&lt;/a&gt;&lt;/p&gt;

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<p>@xxx123456xxx‌ hey! I might major in psych too! hahah. I’m actually debating between psych and neuroscience major, but whatever you major in, if you pass the exam, it’ll definitely support you at college. You’re going to have to take chemistry again anyways so the AP exam can hopefully save you some time and money. </p>

<p>Although you get the practice FRQs wrong, what I’m doing is I’m just doing more and more and seeing where my mistake is so that I have at least more experience in it. Repetition helps. </p>

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<p>Anybody else taking AP Chem and AP Psych tomorrow?</p>

647

<p>GUYS was the barrons part 2 extremely difficult for everyone ( i did better on the barrons mc than on the practice exam mc but the part 2 was MUCH harder for me than the practice exam part 2) </p>

648

<p>@rockinman1 ikr. the barrons always make the tests harder than the real ones. and I really don’t get the ones where you have to write down the lab materials and stuff</p>

649

<p>does anyone get #3 on the barrons Practice Test 2 MC?</p>

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<p>Does anyone want to make a tinychat?</p>

651

<p>ahhh. i am taking ap psyc and chem tomorrow…</p>

<p>do you guys have an estimate about how many mc you get right for 4 on ap chem</p>

652

<p>depends on how you do on the frq</p>

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<p>I have a question. For the lewis dot diagram for CH2O2, why is C bonded with H, double bonded with O and single bonded with O which is then bonded with H? I thought that C would bond with 2 H and one O which is bonded with another O. </p>

654

<p>Probably 60%</p>

655

<p>@KbbGrizzly Right now I’m just going over all the main concepts. I’ll probably do some review for FRQ tonight but I pretty much accepted my fate. I’m glad that Psych was so good to me though lol bc it is my major. I’m nervous about bio though :/. Yeah I’m looking forward to it! @HawkAce I am–are you prepared for the Psych Exam? I’m also taking Eng Lang on Friday and Bio the following Monday</p>

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<p>@hawkace I think it is because the Ch2o2 is an acid. perhaps your way is a structural isomer? </p>

657

<p>you use the HONC rule.</p>

<p>the c needs 4 bonds
the o needs 2 bonds</p>

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<p>@HawkAce I’m not quite sure what you’re asking lol but I do remember something about the most electronegative being in the middle of the Lewis dot diagram? Maybe that’s it? Maybe someone else can help you out.</p>

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<p>@NewJersey25‌ I have a feeling that it has to do with the electronegativity of O, but I’m not sure. </p>

<p>@xxx123456xxx‌ I’m more for Psych than Chem even though I’m self-studying for Psych and took the actual class for Chem. Lol</p>

660

<p>im taking stat this Friday and bio next mondayy.</p>

<p>im freakin out i had all my APs last sem…except bio which is year long</p>