AP Chemistry Review Thread

<p>supah-cram for me...</p>

<p>
[quote]
supah-cram for me...

[/quote]
</p>

<p>werd</p>

<p>So should we only know what a Lewis Acid/Base is or should we know the other two? Isn't Bronsted Lowry the same thing as Lewis?</p>

<p>I think while Bronsted Lowry defines acids as proton donors and bases as proton acceptors, Lewis acids accept electron pairs and bases donate electron pairs. But you're right-- most (if not all) Bronsted Lowry acids can also be defined as Lewis Acids. </p>

<p>And then Arrhenius acids produce H+ and bases OH-. yeah</p>

<p>We should know both Lewis and Bronsted. Lewis is when a base donates an electron pair. Bronstead is when acid donates a proton. Examples of Lewis would be the classic BF3 and NH3 reaction, as well as the complexation of Al.</p>

<p>Our class hasn't done much spontaneity so:</p>

<p>For the equation Change in G = -n(faraday's constant)(E Naught)</p>

<p>For what compound (in an reaction equation) does the n represent moles for?</p>

<p>Can we expect any thing of acid-base buffers/titrations? if so what</p>

<p>N represents moles of electrons transferred. You find this by balancing the redox half-reactions with each other.</p>

<p>Do we have to know common oxidizing agents and reducing agents?</p>

<p>4FeS(s) + 702(g) -> 2Fe2O3(s) + 4SO2(g)</p>

<p>delta H = -2432 kJ mol-1</p>

<p>When the above reaction is at equilibrium for any given pressure, P, and temperature, T, which of the following will shift the position of equilibrium so that more product is formed?</p>

<p>A- increase the temp w/o changing pressure
B- Add an inert gas to increase the pressure of the system
C- Add a catalyst specific for the forward reaction
D- Remove the Fe2O3 as it is formed
E- Remove the SO2 as it is formed</p>

<p>Barron's says the answer to this is E. Why is it not B, or going by the logic of E why is it not D also?</p>

<p>About B):</p>

<p><a href="http://dbhs.wvusd.k12.ca.us/webdocs/Equilibrium/LeChatelier-Intro.html%5B/url%5D"&gt;http://dbhs.wvusd.k12.ca.us/webdocs/Equilibrium/LeChatelier-Intro.html&lt;/a&gt;&lt;/p>

<p>Example #7 - the system below is already at equilibrium when some neon is added to the system. What happens to the position of the equilibrium? Does it shift right, left, or no change?</p>

<p>H2 + Cl2 <===> 2 HCl</p>

<p>The neon DOES NOT participate in the chemical reactions (forward and reverse) which make the equilibrium. Therefore, the presence of the inert gas has NO EFFECT on the position of the equilibrium. The [H2], [Cl2] and [HCl] would all remain unchanged. </p>

<p>About E): solids are not included in equilibrium expressions; therefore the only species to be concerned with are O2 and SO2 (K = [SO2]^4 / [O2]^7)</p>

<p>anybody knows a good website for kinetics?
I don't like it very much.</p>

<p>also, I would greatly appreciate if somebody could explain Beer's Law to me.</p>

<p>the solubility post said that beers law was on the 03 06 and 04 exams. So its very doubtful that it will be on it this year.</p>

<p>D...its a solid, not a gas. Only gases effect it</p>

<p>letz go over the colors
CrO4 (yellow)
Cu2+/Cu+ (blue)
Ni^2+ (green)
Cr2O7^2- (orange)
MnO4 (purple)</p>

<p>anyone know a good mnemonic for the hybridzation shapes?</p>

<p>You mean sp, sp2, sp3, etc.?</p>

<p>For every letter you have that's one domain.</p>

<p>i think neoking means square planar, trigonal pyramidal, seesaw, etc.</p>

<p>Everyone learn their net ionics?</p>

<p>=O</p>

<p>does anyone know how to do this question?</p>

<p>As the temperature is raised from 20 ° C to 40 ° C, the average kinetic energy of neon atoms changes by a factor of</p>

<pre><code>(A) 1/2
(B) square root of
(C) 313/293
(D) 2
(E) 4
</code></pre>

<p>the answer is B but why?</p>

<p>so i am offically dying from studying right now, i think im ready! bring it on!!
My only question is the lab question it better not be on tirtations, although im thinking it will be</p>