<p>the passage said for study 1, the point was to get the capacitor fully charged and the point of study 2 was to get it uncharged.</p>
<p>I believe i got a 36 on this section :)</p>
<p>Gah…I don’t think I spent time to read the passage. Hmmm. But it was what the vtage was equal to…lame</p>
<p>Free, were you talking to me? If so, then yes, we do.</p>
<p>Ahh I spent a few minutes rereading it and was still confused–I just went with the Exp2 data like you guys did. Haha if no one else saw a typo I was probably seeing things… I considered contacting them but wanted to see if anyone else saw. It’s pretty unlikely they’d make that mistake too</p>
<p>The physics portion scared me especially. And out of physics electricity was just nuts. I HATE e+m. that is a formidable subject; it’s harder than mechanics. But you didn’t need to know e+m for this.</p>
<p>The last question about calcium carbonate: it was A (right?), because .1 g of egg shell is 95% (they used the word “primarily”) CaCO3. So a mixture of egg shell combined with something 0% calcium carbonate is greater than two .1 quantities containing ~10% caco3. I’m pretty sure I’m right about this one, but could someone just verify that it was A?</p>
<p>RAlec114
C said the mixture in which both materials had a 10% calcium carbonate content would release the most gas.</p>
<p>I think it was like this:
A. egg shell and something else b/c of high caco3 content
B. egg shell and something else b/c of low caco3 content
C. cement and something else b/c of high caco3 content
D. cement and something else b/c of low caco3 content</p>
<p>please somebody verify this order, b/c i will freak if A and B are switched.</p>
<p>^Is the choice that said that egg shell and something else would have greater mass of CaCO3 than something and something else?
If so, then yea that is correct. </p>
<p>Also, I remembered another question. What was the answer to the question that was like "what assumption had to be made in experiment 2 of the CaCO3? Experiment 2 was when they took CaCO3 out of antacid, other supplements, eggshells, etc. I put that CaCO3 reacted with all (or none?) of them. Is that right?</p>
<p>^ I think it was that nothing else would produce a gas, that only caco3 was responsible for that. something like that. i think.</p>
<p>yea, the answer was definitely not C. it was A or B, but at the last minute, right before the proctor said time was up, i changed it to A b/c I assumed it had that order. At first I put down what Alec had, but I changed it.</p>
<p>What did everyone else put for that?</p>
<p>This may be the difference between a 36 and a 35 lol!!!</p>
<p>
</p>
<p>That is what I put and Soccer Ryan agreed with me. What do you guys think?</p>
<p>Damn both our answers seem viable. But did isolate caco3 or did they just add the chemicals and see if it yielded a gas?</p>
<p>yea wongtongtong, that’s what I think I had.</p>
<p>i dont remember the 14 sec one.</p>
<p>what was the question with the rate of something for CaCO3? I didn’t have time to look at it so at the last minute I put B.</p>
<p>v WongTongTong
cool back to studying Physics C Friction :eek:</p>
<p>No, it was actually not possible to isolate simply CaCO3 unless they did it through gravimetric analysis, which they did not do. They simply added the acid and the meq acid = meq CO3 2- ion and from they got the CaCO3, I think. :p</p>
<p>crap. There goes my 36</p>
<p>^How? What did you put for that?</p>
<p>I can’t remember exactly. But as of now, I am thinking that i put that CaCO3 reacted with all of them. The reason i said this was that in the little blurb about the experiment, it said that each of the following materials (antacids, eggshells, other supplements, etc) had CaCO3 gas or something like that. So i thought that the CaCO3 was assumed to react with all of them.</p>
<p>that might be the same thing as i assumed that only the CaCO3 reacted with the acid and nothing else right</p>
<p>lebonbonbon I noticed that typo too, and I discussed it afterwards w/some of my friends and one of them noticed it also, so I I’m pretty sure ACT made the mistake. I dont remember what it was about now, but there was definitely an error that wasted some of my valuable time as I thought about it.</p>
<p>
</p>
<p>Unfortunately, I don’t think so. You are saying that it only reacted with the acid but i am saying that it reacted with everything. I am probably wrong.</p>
<p>wait I think the difference here is:</p>
<p>-All of them had calcium carbonate, which will always react to equilibrium for that reaction. But was it a fact that it had calcium carbonate? You might be right.</p>
<p>-there could have been other chemicals that could have created gas, of which there was no mention.</p>
<p>I do remember reading your former statement borkborkbork on my test. This is why i went with the choice i did. IDK i could have misinterpreted. UGH it sucks when you can’t remember.</p>