<ol>
<li><p>Are we allowed access to a Periodic Table during the MC part?</p></li>
<li><p>Does anyone have a reference page for “acceptable laboratory practice”?
I’ve gotten that question wrong on both practice MCs so far and it seems like a bad point to lose. Why is “Using distilled water for the final rinse of a buret before filling it with standardized solution” bad? I haven’t done many labs since I’m doing AP Chem as an independent study. </p></li>
<li><p>Electroplating of Nickel, 0.200 Faraday of electrical charge is passed through a solution of NiSO4. What mass of Nickel is deposited?</p></li>
</ol>
<ol>
<li><p>Yes</p></li>
<li><p>The objective of the lab is to determine the unknown substance. If you wash the burette with water you’ll contaminate the titrant thus ruining your lab.</p></li>
</ol>
<p>This is applicable to both the AP and the SAT :
Is NH3 tetrahedral, or trigonal pyramidal?
I am reading different answers everywhere.</p>
<p>Also:
Which of the following is the density of nitrogen at STP?
Am I supposed to assume it’s nitrogen gas, and thus diatomic?</p>
<p>Third:
The strength of acids formed in water is based on which of the following?
I. The polarity of the molecule
II. The size of the molecule
III. The strength of the bond</p>
<p>Why is it II and III? I thought it was I and III.</p>
<p>(.200 Faraday)(96500 C/Faraday)(1 mole e-/96500 C)(1 mol Ni/2 mol e-)(58.69 g Ni/mol Ni)=5.87 g Ni</p>
<p>Abrayo,</p>
<ol>
<li>Both, because of NH3’s lone pair. Its electron-pair geometry is tetrahedral, but its molecular geometry is trigonal pyramidal.</li>
<li>Yes.</li>
</ol>
<p>My teacher is having a review tomorrow from 8-4. I don’t think there is much you can do to study the last day. Our class had finished last month and it’s just been review since then.</p>
<p>The most important thing I think is making sure you have everything like solubility rules/trends/etc. memorized the last day.</p>
<p>this website shows how the greater the electronegativity (polarity) the more acidic it is, and also more bond strength the less acidic. So would believe it is 1 and 3. Where are you getting this question?</p>
<p>I’ve been doing all math based review for the last few days. I’m going to be reviewing the earlier concepts tomorrow and Sunday. </p>
<p>My goal is a 3 for AP Chem since I took a lower tier Chemistry class rather than the AP class. My Chemistry class is having a test on Acid&Bases on Tuesday lol. I pretty much self-studied Acid/Bases, Electrochemistry, and Nuclear chemistry in like a week. Hopefully I do OK. </p>
<p>I’m skipping Organic chem and biochem because there’s like a 1.333% chance that a question like that will show up on the exam. </p>
<p>Do you guys know what raw score I would need for a 3 on the exam?</p>
<p>I forgot why a greater electronegativity (polarity) make the molecule more acidic?
Greater electronegativity increases the intermolecular forces, but decrease the intramolecular forces right??</p>
<p>All you need to know is what hybridization an indicated atom has and be able to count sigma and pi bonds. You don’t need to know all the theory and stuff like they have in chapter 9 of Zumdahl.</p>
<p>According to the AP Calculator if I get 30 MC correct and a 5 on every FRQ I can get away with a 3.</p>
<p>How important is electron geometry and molecular shape? I never understood how the dipole-dipole/london dispersion worked and how to figure out the overall attraction.</p>
<p>Not in any of the (2) old MCs I’ve taken.
It wouldn’t hurt to learn it though, since it’s only a direct relationship (p = kc). </p>
<p>How much is nuclear chem covered?
There was only one question on each test I took, and they were both just an add the number of protons and neutrons and make them the same.</p>
