<p>Haha, for electrochem, I know how you felt, until I saw this diagram:</p>
<p>[SparkNotes:</a> Electrolytic Cells: Electrolysis](<a href=“http://www.sparknotes.com/chemistry/electrochemistry/electrolytic/section1.html]SparkNotes: ”>http://www.sparknotes.com/chemistry/electrochemistry/electrolytic/section1.html )</p>
<p>this is basically self explanatory. Follow this diagram with a prep book explanation and it should clear it up in no time.</p>
<p>for thermo, I find that you have to worry about how to calculate delta H, Hess’s law, and then bonding forces. G = S - TS is also a big factor, along with activation graphs.</p>
<ol>
<p>how is it E?</p>
<p>Can someone PM me any year AP Chem Multiple Choice? Thanks</p>
vip747
May 11, 2009, 4:23pm
324
<p>hey how are the cliffnotes practice test for chem</p>
<p>i always have some difficulties with net ionic equations =(</p>
<p>aznjunior…</p>
<p>Scandium is (in full notation) 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d1</p>
<p>L quantum number 1 means electrons in P orbital… the only electrons in p orbitals in scandium are the ones in 2p6 and 3p6… 6 + 6 = 12</p>
<p>
</p>
<p>You meant G = H - TS?</p>
<p>thanks, i just realized that l was L and not 1</p>
<ol>
<pre><code> C3H8(g) + 5O2(g) -----> 3CO2(g)+4H2O(g)
<p>which of the following is true at any temperature?</p>
<pre><code> I. /\G < 0
A. I only
<p>how is it b?</p>
<p>thanks serafina i’ll definitely look at that!</p>
<p>Well its combustion which gives off heat. Its exothermic process so Delta H is negative.</p>
<p>i know delta H is negative, but the way it’s written, shouldn’t delta S be positive and thus delta G be negative</p>
<p>It said any temperature. There are temperatures where the other two conditions can change. However, it will always give off heat.</p>
<p>I got a 53/75 on the 2002 exam but like a 2/75 on the 1984 exam…</p>
<p>okay a bit more than 2. but I HATE AP CHEM. I’ve been studying so much and i don’t get crap.</p>
<p>You got a 53/75… that’s good enough for a 5.</p>
<p>That’s actually kinda funny because I took the 2002 test today and got the same raw score. Even though I still feel like I don’t know much, it’s nice to know that around 70% of kids who got my score on the MC section got a 5 overall…</p>
<p>won’t entropy always increases though since it’s creating more moles in the product than the reactant</p>
<p>Which element exhibits the greatest number of different oxidation states?
<p>the answer is e why…</p>
<p>another question is A solution prepared to be initially 0.5M CH3COOH and 1M in CH3COONa is BUFFER SOLUTION WITH PH BETWEEN 4 AND 7 </p>
<p>i understand that its a buffer solution, but why is it acidit instead of basic since the basic buffer has higher concentration?</p>
<p>N has the most oxdation states because O is always -2, while N can be -3, or -2, -1, etc. Based on nitrates, nitrite, and nitride.</p>